and { only { filter_eq { filter_eq { all_rows ; court surface ; hard } ; location ; shanghai } } ; eq { hop { filter_eq { filter_eq { all_rows ; court surface ; hard } ; location ; shanghai } ; tournament } ; shanghai masters } } = true
select the rows whose court surface record fuzzily matches to hard . among these rows , select the rows whose location record fuzzily matches to shanghai . there is only one such row in the table . the tournament record of this unqiue row is shanghai masters .