In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.

Question: What is the population of the city founded by William Byrd II? Passage:Coal mining in the Midlothian area of Chesterfield County began in the 18th century. Around 1701, French Huguenot settlers to the area discovered the existence of the coalfield. The coalfield was part of the Richmond Basin which is one of the Eastern North America Rift Basins which contains some sedimentary rock and bituminous coal. In a 1709 diary entry William Byrd II, who is credited as the founder of Richmond, and had purchased of land in the area where coal was found, noted that "the coaler found the coal mine very good and sufficient to furnish several generations." It was first commercially mined in the 1730s, and was used to make cannon at Westham (near the present Huguenot Memorial Bridge) during the American Revolutionary War.
In a 1709 diary entry William Byrd II, who is credited as the founder of Richmond, and had purchased of land in the area where coal was found, noted that "the coaler found the coal mine very good and sufficient to furnish several generations