MoreAnalyzing graph dataKuzuQAChainOn this pageKuzuQAChainThis notebook shows how to use LLMs to provide a natural language interface to Kùzu database.Kùzu is an in-process property graph database management system. You can simply install it with pip:pip install kuzuOnce installed, you can simply import it and start creating a database on the local machine and connect to it:import kuzudb = kuzu.Database("test_db")conn = kuzu.Connection(db)First, we create the schema for a simple movie database:conn.execute("CREATE NODE TABLE Movie (name STRING, PRIMARY KEY(name))")conn.execute(    "CREATE NODE TABLE Person (name STRING, birthDate STRING, PRIMARY KEY(name))")conn.execute("CREATE REL TABLE ActedIn (FROM Person TO Movie)")    <kuzu.query_result.QueryResult at 0x1066ff410>Then we can insert some data.conn.execute("CREATE (:Person {name: 'Al Pacino', birthDate: '1940-04-25'})")conn.execute("CREATE (:Person {name: 'Robert De Niro', birthDate: '1943-08-17'})")conn.execute("CREATE (:Movie {name: 'The Godfather'})")conn.execute("CREATE (:Movie {name: 'The Godfather: Part II'})")conn.execute(    "CREATE (:Movie {name: 'The Godfather Coda: The Death of Michael Corleone'})")conn.execute(    "MATCH (p:Person), (m:Movie) WHERE p.name = 'Al Pacino' AND m.name = 'The Godfather' CREATE (p)-[:ActedIn]->(m)")conn.execute(    "MATCH (p:Person), (m:Movie) WHERE p.name = 'Al Pacino' AND m.name = 'The Godfather: Part II' CREATE (p)-[:ActedIn]->(m)")conn.execute(    "MATCH (p:Person), (m:Movie) WHERE p.name = 'Al Pacino' AND m.name = 'The Godfather Coda: The Death of Michael Corleone' CREATE (p)-[:ActedIn]->(m)")conn.execute(    "MATCH (p:Person), (m:Movie) WHERE p.name = 'Robert De Niro' AND m.name = 'The Godfather: Part II' CREATE (p)-[:ActedIn]->(m)")    <kuzu.query_result.QueryResult at 0x107016210>Creating KuzuQAChain​We can now create the KuzuGraph and KuzuQAChain. To create the KuzuGraph we simply need to pass the database object to the KuzuGraph constructor.from langchain.chat_models import ChatOpenAIfrom langchain.graphs import KuzuGraphfrom langchain.chains import KuzuQAChaingraph = KuzuGraph(db)chain = KuzuQAChain.from_llm(ChatOpenAI(temperature=0), graph=graph, verbose=True)Refresh graph schema information​If the schema of database changes, you can refresh the schema information needed to generate Cypher statements.# graph.refresh_schema()print(graph.get_schema)    Node properties: [{'properties': [('name', 'STRING')], 'label': 'Movie'}, {'properties': [('name', 'STRING'), ('birthDate', 'STRING')], 'label': 'Person'}]    Relationships properties: [{'properties': [], 'label': 'ActedIn'}]    Relationships: ['(:Person)-[:ActedIn]->(:Movie)']    Querying the graph​We can now use the KuzuQAChain to ask question of the graphchain.run("Who played in The Godfather: Part II?")            > Entering new  chain...    Generated Cypher:    MATCH (p:Person)-[:ActedIn]->(m:Movie {name: 'The Godfather: Part II'}) RETURN p.name    Full Context:    [{'p.name': 'Al Pacino'}, {'p.name': 'Robert De Niro'}]        > Finished chain.    'Al Pacino and Robert De Niro both played in The Godfather: Part II.'chain.run("Robert De Niro played in which movies?")            > Entering new  chain...    Generated Cypher:    MATCH (p:Person {name: 'Robert De Niro'})-[:ActedIn]->(m:Movie)    RETURN m.name    Full Context:    [{'m.name': 'The Godfather: Part II'}]        > Finished chain.    'Robert De Niro played in The Godfather: Part II.'chain.run("Robert De Niro is born in which year?")            > Entering new  chain...    Generated Cypher:    MATCH (p:Person {name: 'Robert De Niro'})-[:ActedIn]->(m:Movie)    RETURN p.birthDate    Full Context:    [{'p.birthDate': '1943-08-17'}]        > Finished chain.    'Robert De Niro was born on August 17, 1943.'chain.run("Who is the oldest actor who played in The Godfather: Part II?")            > Entering new  chain...    Generated Cypher:    MATCH (p:Person)-[:ActedIn]->(m:Movie{name:'The Godfather: Part II'})    WITH p, m, p.birthDate AS birthDate    ORDER BY birthDate ASC    LIMIT 1    RETURN p.name    Full Context:    [{'p.name': 'Al Pacino'}]        > Finished chain.    'The oldest actor who played in The Godfather: Part II is Al Pacino.'PreviousHugeGraph QA ChainNextMemgraph QA chainCreating KuzuQAChainRefresh graph schema informationQuerying the graph