Question: When did the administrative territorial entity that shares a border with Washington County (which shares a border with Beaver County) have a population of 30513?
Choices:
2004-01-14
1973-01-01
2011-07-01
1870-12-01
1978-01-20
1961-01-01
1396
2006-03-01
1987-07-07
1954-01-01