diff --git a/Big_Data/exercise11/Exercise11_RumbleDB_2023.ipynb b/Big_Data/exercise11/Exercise11_RumbleDB_2023.ipynb
index 88440c2..6f1c2c2 100644
--- a/Big_Data/exercise11/Exercise11_RumbleDB_2023.ipynb
+++ b/Big_Data/exercise11/Exercise11_RumbleDB_2023.ipynb
@@ -466,7 +466,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Let us know look at nested objects. It seems the key \"actor\" has these, so let us now use the dot object lookup to find all these values."
+    "Let us now look at nested objects. It seems the key \"actor\" has these, so let us now use the dot object lookup to find all these values."
    ]
   },
   {
@@ -807,7 +807,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The sequence to iterator on can itself come from a dataset, such as the one we were using previously:"
+    "The sequence to iterate on can itself come from a dataset, such as the one we were using previously:"
    ]
   },
   {
@@ -1444,7 +1444,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Note that the `else` clause is required - however, it can be the empty sequence `()` which is often when you need if only the `then` clause is relevant to you. For instance,"
+    "Note that the `else` clause is required - however, it can be the empty sequence `()` which is often what you need if only the `then` clause is relevant to you. For instance,"
    ]
   },
   {
@@ -1714,7 +1714,7 @@
    "source": [
     "### Access yet another dataset\n",
     "\n",
-    "RumbleDB can read input from many file systems and many file formats. If you are using our backend, you can only use `json-doc()` with any URI pointing to a JSON file and navigate it as you see fit. \n",
+    "RumbleDB can read input from many file systems and many file formats. If you are using our backend, you can just use `json-doc()` with any URI pointing to a JSON file and navigate it as you see fit. \n",
     "\n",
     "You can read data from your local disk, from S3, from HDFS, and also from the Web. For this tutorial, we'll read from the Web because, well, we are already on the Web.\n",
     "\n",
@@ -1908,7 +1908,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "See the explanation of predict on positions `position()` [here](https://rumble.readthedocs.io/en/latest/JSONiq/). "
+    "See the explanation of the predicate on positions `position()` [here](https://rumble.readthedocs.io/en/latest/JSONiq/). "
    ]
   },
   {
diff --git a/Big_Data/exercise11/Exercise11_RumbleDB_2023_Solutions.ipynb b/Big_Data/exercise11/Exercise11_RumbleDB_2023_Solutions.ipynb
index 3f47f17..1e6df4c 100644
--- a/Big_Data/exercise11/Exercise11_RumbleDB_2023_Solutions.ipynb
+++ b/Big_Data/exercise11/Exercise11_RumbleDB_2023_Solutions.ipynb
@@ -464,7 +464,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Let us know look at nested objects. It seems the key \"actor\" has these, so let us now use the dot object lookup to find all these values."
+    "Let us now look at nested objects. It seems the key \"actor\" has these, so let us now use the dot object lookup to find all these values."
    ]
   },
   {
@@ -805,7 +805,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The sequence to iterator on can itself come from a dataset, such as the one we were using previously:"
+    "The sequence to iterate on can itself come from a dataset, such as the one we were using previously:"
    ]
   },
   {
@@ -1442,7 +1442,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Note that the `else` clause is required - however, it can be the empty sequence `()` which is often when you need if only the `then` clause is relevant to you. For instance,"
+    "Note that the `else` clause is required - however, it can be the empty sequence `()` which is often what you need if only the `then` clause is relevant to you. For instance,"
    ]
   },
   {
@@ -1712,7 +1712,7 @@
    "source": [
     "### Access yet another dataset\n",
     "\n",
-    "RumbleDB can read input from many file systems and many file formats. If you are using our backend, you can only use `json-doc()` with any URI pointing to a JSON file and navigate it as you see fit. \n",
+    "RumbleDB can read input from many file systems and many file formats. If you are using our backend, you can just use `json-doc()` with any URI pointing to a JSON file and navigate it as you see fit. \n",
     "\n",
     "You can read data from your local disk, from S3, from HDFS, and also from the Web. For this tutorial, we'll read from the Web because, well, we are already on the Web.\n",
     "\n",
@@ -1903,7 +1903,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "See the explanation of predict on positions `position()` [here](https://rumble.readthedocs.io/en/latest/JSONiq/). "
+    "See the explanation of the predicate on positions `position()` [here](https://rumble.readthedocs.io/en/latest/JSONiq/). "
    ]
   },
   {