You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Which Pennsylvanian city sits at the confluence of the Delaware River?" whose answer is Easton is located at the confluence of the Delaware River and the Lehigh River, roughly 55 mi north of Philadelphia and 70 mi west of New York City..
Each document should contain about 30 words, and these documents should contain useful information.

Query: cities in Pennsylvania at the confluence of the Delaware River
Useful Output:

Doc 1:  the small town of Frackville in east-central Pennsylvania and the confluence of the Delaware and Schuylkill Rivers in Philadelphia.
Doc 2: The Christina River is tidal from just south of the town of Christiana to its confluence with the Delaware River at Wilmington. Although the Christina River
Doc 3: The East Branch of Chester Creek rises in East Whiteland and flows 24 miles to its confluence with the Delaware River in Chester City, Pennsylvania,
Doc 4:  water supply and industry. • The DRB supports the water needs of two of the nation's largest cities: Philadelphia and New York City, as well
Doc 5: Darby Creek, located in southeastern Pennsylvania, flows into the Delaware River just south of the Schuylkill River and the City of Philadelphia. The watershed