Sentence:  If he had any worries , it was only the small ones , about Mother in New York , and his daughter Edwina and what she might be doing at this hour , with her Aunt Asia , in <WSD>Philadelphia</WSD> . 
Meaning of the word marked with <WSD> tags:  the largest city in Pennsylvania; located in the southeastern part of the state on the Delaware river; site of Independence Hall where the Declaration of Independence and the Constitution were signed; site of the University of Pennsylvania