Social capital refers to the links and bonds formed through friendships and acquaintances. These links can form through friendship groups, i.e. knowing a friend of a friend.
Entrepreneurship is the act by an individual to start and develop their own business. This involves the willingness to take risks in the hope of profit. We can look at the founders of Microsoft, Bill Gates and Paul Allen, as entrepreneurs. They both invested both time and money into starting and developing Microsoft.