Task: Question Answering
Input (English): Passage: Thirteen-year-old identical twin sisters Sam and Emma Stanton are opposites growing up in Evanston. Sam is a star  soccer player and a Tomboy; however, she wants to attract boys. Emma is a Girly girl who enjoys fashion and make-up, but she wants to be better at sports. Their dad Jerry, one of the Soccer coaches, is pressured by his wife Denise to pick Emma for the Hurricanes Co-ed team. Just as Jerry is about to pick Sam for his team after Round 2 of Soccer Tryouts is over, the Buzzards coach Willard Holmes picks Sam. But Sam is not thrilled to join a team which hasn't won in years and Emma finds it difficult to please her dad so the girls come up with a scheme to switch places in soccer so each can be on the team they prefer. As a result, Sam learns about letting others share the spotlight and Emma and Jerry finally become closer. Their mom catches them and the girls have to go back to their original teams. When everyone else is mad at them Sam and Emma both decided to quit soccer, but Jerry refuses to let them give up the sport. Denise becomes the Buzzards new coach to prove her husband wrong and actually gets the team into the finals. Along the way Emma realizes her skill as a goalie and becomes a better athlete. At the finals the Hurricanes regular goalie Richie gets injured while blocking a kick and is replaced by Emma. At 20 seconds left Sam kicks the ball into the goal, and it is blocked by Emma, tying the game. The Buzzards and the Hurricanes become co-champions of the Youth soccer league organisation tournament. Sam gets a date with Greg. Richie goes on a date with Emma. Jerry learns to treat his daughters equally and that winning isn't everything. 
Question: What are the names of the girls whose mom finds out they switched teams?
Output (English): Sam.