Sentence:  They seem equipped to drag the building between them right down Pennsylvania Avenue, but their progress is arrested by two heroes of <WSD>Popeye</WSD> musculature, government men putting a check rein on willful industry. 
Meaning of the word marked with <WSD> tags:  A tough cartoon sailor, full name Popeye the Sailor, characterized by bulging forearm muscles, a squinty eye, and an affinity for spinach.