How many days after an agreement was signed for the delivery of 100 AMX-13 tanks was a $80 million deal was agreed?
return an agreement was  signed for the  delivery of 100 AMX-13 tanks ;return a $ 80 million deal was  agreed ;return when  was  #1 ;return when  was  #2 ;return difference of #4 and  #3 in  days
['select', 'select', 'project', 'project', 'arithmetic']