Question: In what county in New Hampshire had significant development in the second half of the 19th century and first decades of the 20th?
Sentence (from "Franklin Falls Historic District"): The district is focused on Central Street (U.S. Route 3) between two crossings of the Winnipesaukee River, and includes Odell Park along with industrial properties along the bend in the river north of those two crossings, as well as a number of properties on adjacent streets south of Central Street.
Relevant evidence: No