Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.
Q: Paragraph: Reese 's Peanut Butter Cups are a popular American candy consisting of a milk , white , or dark chocolate cup filled with peanut butter , marketed by The Hershey Company . They were created in 1928 by H.B. Reese , a former dairy farmer and shipping foreman for Milton S. Hershey . Reese was inspired by Hershey and left dairy farming to start his own candy business .
Question: when did reese's peanut butter cups first come out

A: 
1928