Updated README

Author: rb-addepto

README.md

@@ -2,16 +2,38 @@
 Graph builder package. 
 
 ## Installation
+Following good practices we suggest you create a separate virtual environment for working with Graph builder package.
+
+Note that the graph_builder requires python 3.12 or higher.
+
 ```
 poetry install
 ```
 
 ## Usage
+
+Note that this is a short example taken from `examples/example1.ipynb`, for more information please
+refer to it.
 ```python
-from entity_graph import EntitiesGraphExtractor
+from entity_graph.graph_extractor.entities_graph_extractor import EntitiesGraphExtractor
+
+# Initialize the Extractor
+extractor = EntitiesGraphExtractor()
+
+test_data_path = "" # replace it with a correct data path
 
-builder = EntitiesGraphExtractor()
-builder.load_table_from_file(config)
+# Specify extraction configuration
+config = {
+    "extraction_type": "table_from_header",
+    "filename": test_data_path + "coffee_machines.pdf",
+    "header": ['Manufacturer', 'Coffee Machine Name', 'Machine ID', 'Production Year', 'Machine Type', 'Power (W)', 'Pressure (bar)', 'Water Tank Capacity (L)', 'Additional Features'],
+}
 
-builder.entities_graph_manager.export_objects_graph(collection="default")
+# Load table to graph
+extractor.load_table_from_file(
+    config,
+    "coffee_machines.pdf", 
+    "Machines", 
+    "instances",
+)
 ```