You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
University_of_Kansas

Context:
Notable alumni include: Alan Mulally (BS/MS), former President and CEO of Ford Motor Company, Lou Montulli, co-founder of Netscape and author of the Lynx web browser, Brian McClendon (BSEE 1986), VP of Engineering at Google, Charles E. Spahr (1934), former CEO of Standard Oil of Ohio.

Question:
For what company did Charles Spahr serve as CEO?

Standard Oil of Ohio