Suppose Ólafur Ragnar Grímsson served as the President of Iceland from 1996 to 2016. He founded the People's Alliance party and co-founded the Democratic Labor Party. Grímsson also served as Minister of Finance in Iceland and was involved in the establishment of various environmental and energy initiatives.
Can we infer that "Grímsson was only involved in politics for a brief period of time."? Yes, no, or maybe?