text: <START_QUESTION> dr. garrison has told all the towns people that he will get across grass lake with no assistance. he told everybody to meet him at grass lake on Sunday at 12: 00. so when everybody showed up on sunday, dr. garrison finished his task by getting across grass lake. how did he do it? <END_QUESTION>
  <ANSWER> grass lake was frozen <END_ANSWER><|endoftext|>