Conversation so far:
who was rockefeller's business partnership with?
In 1859, Rockefeller went into the produce commission business with a partner, Maurice B.
Clark, and they raised $4,000 ($108,948 in 2017 dollars) in capital.

Question: what kind of busiiness were they into?
Self-contained rewrite: What business were Rockefeller and partner Maurice B. Clark into?