text: NaN     2       1     1       0         0             0       10    on_llm_end     NaN     2       1     1       0         0             0       11    on_llm_end     NaN     2       1     1       0         0             0       12  on_llm_start  OpenAI     3       2     1       0         0             0       13  on_llm_start  OpenAI     3       2     1       0         0             0       14  on_llm_start  OpenAI     3       2     1       0         0