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.
what kind of busiiness were they into?
In this environment of wasteful boom, the partners switched from foodstuffs to oil, building an oil refinery in 1863 in "The Flats".
what other partnership did he have?
The commercial oil business was then in its infancy.
Whale oil had become too expensive for the masses, and a cheaper, general-purpose lighting fuel was needed.
what else can you tell me that is interesting?
Rockefeller bought out the Clark brothers for $72,500 (equivalent to $1 million in 2017 dollars) at auction and established the firm of Rockefeller & Andrews.

Question: what did the firm do?
Self-contained rewrite: What did the Rockefeller & Andrews firm do?