Add Legal Terms to Trajectory Clustering Notebook (#1111)

This PR adds license terms to trajectory clustering notebook.

Authors:
  - Michael Wang (https://github.com/isVoid)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)
  - Mark Harris (https://github.com/harrism)
  - Ben Jarmak (https://github.com/jarmak-nv)

URL: #1111

notebooks/trajectory_clustering.ipynb

@@ -45,12 +45,29 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
     "## Load preprocessed trajectories"
    ]
   },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The real-world trajectory dataset we used here for this example is collected from a traffic intersection located in Dubuque, Iowa.\n",
+    "We applied the following steps to extract vehicle trajectories from multiple cameras implemented at this intersection:\n",
+    "\n",
+    "- Detect vehicle locations in camera domain using AI based detectors\n",
+    "- Apply tracking algorithm to assign the same id to the same vehicle\n",
+    "- Project the vehicle location from camera domain to latitudes and longitudes\n",
+    "- Create trajectories based on vehicle id\n",
+    "\n",
+    "This dataset provided by NVIDIA is under the [Creative Commons 4.0 Attribution-ShareAlike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/)."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 2,
@@ -81,6 +98,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -152,6 +170,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -187,6 +206,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -232,6 +252,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -280,6 +301,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -385,6 +407,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -457,6 +480,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -527,6 +551,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -598,6 +623,7 @@
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [