I want to know the answer to the following question:
How many sister cities does Philadelphia have?
All the background I'm provided with is that "Renovations were made to Sister Cities Park in mid-2011 and on May 10, 2012, SCP was reopened and currently features an interactive fountain honoring Philadelphia's ten sister and friendship cities, a café and visitor's center, children's play area, outdoor garden, and boat pond, as well as pavilion built to environmentally friendly standards.". Is that enough to answer the question?