Sentence:  Chauncey Depew , one-time runner-up for the Republican Presidential nomination , was <WSD>attending</WSD> a convention at Saratoga , where he was scheduled to nominate Colonel Theodore Roosevelt for Governor of New York when he noticed that the temporary chairman was a man he had never met . 
Meaning of the word marked with <WSD> tags:  be present at (meetings, church services, university), etc.