Final answer:
Ben Franklin founded both a fire department and a library in Philadelphia. He did not start a restaurant or a city park.
Step-by-step explanation:
Ben Franklin was a prominent figure in Philadelphia, where he started several important institutions. Specifically, he established a fire department and a library. The Library Company of Philadelphia was founded by Franklin in 1731, becoming one of the first libraries in America. Furthermore, his efforts in establishing a city-wide fire department greatly improved public safety. Despite his wide range of interests and contributions, there is no historical record of Franklin starting a restaurant or a city park as part of his various projects in Philadelphia.