eq { hop { nth_argmax { filter_less { all_rows ; average annual rainfall ( mm ) ; 100 } ; average annual runoff ( mm ) ; 1 } ; administrative region } ; i - tarapacá } = true
select the rows whose average annual rainfall  mm  record is less than 100 . select the row whose average annual runoff  mm  record of these rows is 1st maximum . the administrative region record of this row is i  tarapacá .