col : rank | name | nationality | time row 1 : nan | mark henderson | united states | 54.11 row 2 : nan | eduardo piccinini | brazil | 54.63 row 3 : nan | brian alderman | united states | 54.75 row 4 : 4.0 | francisco sanchez | venezuela | 54.99 row 5 : 5.0 | edward parenti | canada | 55.23 row 6 : 6.0 | diego cuenca | colombia | 55.67 row 7 : 7.0 | jose meolans | argentina | 55.91 row 8 : 8.0 | ruben calderon | el salvador | 56.04
which swimmer came in last place? what was his finishing time?
56.04
Rank Name Nationality Time
what was his finishing time?
nan Mark Henderson United States 54.11
nan Eduardo Piccinini Brazil 54.63
nan Brian Alderman United States 54.75
4.0 Francisco Sanchez Venezuela 54.99
5.0 Edward Parenti Canada 55.23
6.0 Diego Cuenca Colombia 55.67
7.0 Jose Meolans Argentina 55.91
8.0 Ruben Calderon El Salvador 56.04
56.04
what was his finishing time? || which swimmer came in last place?