story: Jim wanted to be the fastest runner in the school. Jim practiced and trained every day to complete his goal. He eventually challenged Chad to a race. Jim won the 100 meter dash but lost in the 200 meter dash. Both Jim and Chad decided to work together to become faster.
 selected sentence: Both Jim and Chad decided to work together to become faster.
Jim and Chad work together on running faster >Causes/Enables> Jim and Chad improve at running