High-priority alert based on source significance and keyword relevance.
Context
What happened: The 1911 breakup of Standard Oil split Rockefeller's trust into 34 companies, and five of them grew into Exxon, Mobil, Chevron, Amoco and ARCO.
Key numbers: 1911 breakup; 34 companies; five successors named.
Why it matters: The content traces the lineage of several major oil companies back to a single trust that was broken up.
What changed
The 1911 breakup of Standard Oil split Rockefeller's trust into 34 companies, and five of them grew into Exxon, Mobil, Chevron, Amoco and ARCO.