Question: Astral Oil Works became part of which branch that was owned by wealthiest American of all time?
Sentence (from "Astral Oil Works"): Charles Pratt and Company (including Astral Oil) became part of John D. Rockefeller’s Standard Oil Trust in 1874, although the fact that Astral Oil was a New York branch of Standard Oil in Ohio was not made public until 1892.
Relevant evidence: Yes