sentence: The next day , when they were about to start filming , there were no ants there , so they searched for them , but they could n't find them ...
modified: The next day when they were about to start filming they ere non ants there so they search for them , but they ca n't find them ...
transformation: PUNCT, PUNCT, OTHER, OTHER, OTHER, PUNCT, VERB:TENSE, VERB:TENSE