text: titanic    Thought:The query is correct, so I can execute it to find the square root of the average age.    Action: query_sql_db    Action Input: SELECT SQRT(AVG(Age)) as square_root_of_avg_age FROM titanic    Observation: [('5.449689683556195',)]    Thought:I now know the final answer    Final Answer: The square root of the average age is approximately 5.45.        > Finished chain.    'The square root of the average age is approximately 5.45.'agent_executor.run("What's the name of the oldest survived passenger?")            > Entering new AgentExecutor chain...    Action: list_tables_sql_db    Action Input:     Observation: titanic    Thought:I should check the schema of the titanic table to see what columns are available.    Action: schema_sql_db    Action Input: titanic    Observation: CREATE TABLE langchain_example.titanic (      PassengerId INT,      Survived INT,      Pclass INT,      Name STRING,      Sex STRING,      Age DOUBLE,      SibSp INT,      Parch INT,      Ticket STRING,      Fare DOUBLE,      Cabin STRING,      Embarked STRING)    ;        /*    3 rows from titanic table:    PassengerId Survived    Pclass  Name    Sex Age SibSp   Parch   Ticket  Fare    Cabin