text: },      "run": null    }    [tool/start] [1:chain:AgentExecutor > 3:tool:alphabet-earnings] Entering Tool run with input:    "{'question': "What was Alphabet's revenue?"}"    [chain/start] [1:chain:AgentExecutor > 3:tool:alphabet-earnings > 4:chain:RetrievalQA] Entering Chain run with input:    {      "query": "What was Alphabet's revenue?"    }    [chain/start] [1:chain:AgentExecutor > 3:tool:alphabet-earnings > 4:chain:RetrievalQA > 5:chain:StuffDocumentsChain] Entering Chain run with input:    [inputs]    [chain/start] [1:chain:AgentExecutor > 3:tool:alphabet-earnings > 4:chain:RetrievalQA > 5:chain:StuffDocumentsChain > 6:chain:LLMChain] Entering Chain run with input:    {      "question": "What was Alphabet's revenue?",      "context": "Alphabet Inc.\nCONSOLIDATED STATEMENTS OF INCOME\n(In millions, except per share amounts, unaudited)\nQuarter Ended March 31,\n2022 2023\nRevenues $ 68,011 $ 69,787 \nCosts and expenses:\nCost of revenues  29,599  30,612 \nResearch and development  9,119  11,468 \nSales and marketing  5,825  6,533 \nGeneral and administrative  3,374  3,759 \nTotal costs and expenses