How many meters difference is there between the minimum and maximum lengths of the field for international adult matches?
return international adult matches ;return the  fields of #1 ;return lengths in  meters of #2 ;return the  highest of #3 ;return the  lowest of #3 ;return the  difference of #4 and  #5
['select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']