CREATE TABLE table_6155 ("Medal" CLOB, "Name" CLOB, "Games" CLOB, "Sport" CLOB, "Event" CLOB)

What sport did the National Team play in the 1968 mexico City Games?
SELECT "Sport" FROM table_6155 WHERE "Name" = 'national team' AND "Games" = '1968 mexico city'
SELECT "Sport" FROM "table_6155" WHERE "Games" = '1968 mexico city' AND "Name" = 'national team'