premise: As soon as the light turned green, the cars accelerated.
initial: Jimmy took the lead until the third lap.
counterfactual: Brian maintained the lead the entire way.
original_ending: Brian caught up and was ahead by a few feet. The lead became bigger since Brian's far was faster. Brian was an expert race car driver.
edited_ending: Brian sped up and stayed ahead by a few feet.The lead became bigger since Brian's car was faster.Brian was an expert race car driver.<SEP>Brian sped up and was ahead by a few feet.The lead became bigger since Brian's far was faster.Brian was an expert race car driver.<SEP>Jimmy caught up and trailed by a few feet.The lead became bigger, though, since Brian's car was faster.Brian was an expert race car driver.