SELECT "Tries against" FROM table_62710 WHERE "Club" = 'burry port rfc'
What tries against value does burry port rfc have?
CREATE TABLE table_62710 (
    "Club" text,
    "Played" text,
    "Drawn" text,
    "Lost" text,
    "Points for" text,
    "Points against" text,
    "Tries for" text,
    "Tries against" text,
    "Try bonus" text,
    "Losing bonus" text,
    "Points" text
)