Question: When was the founder of Siam Cement Group born?
Sentence (from "Siam Cement Group"): Most are joint ventures with internationally renowned companies, for example, Kubota, Yamato Kogyo, Aisin Takaoka Group, Nippon Steel, Toyota Motor, Michelin, Hayes Lemmerz, Siam Mitsui,and Dow Chemical company.
Relevant evidence: No