CREATE TABLE table_64536 ("Rank" CLOB, "Group" CLOB, "Name" CLOB, "Nationality" CLOB, "Mark" CLOB)

What is the mark for Grenada in group A?
SELECT "Mark" FROM table_64536 WHERE "Group" = 'a' AND "Nationality" = 'grenada'
SELECT "Mark" FROM "table_64536" WHERE "Group" = 'a' AND "Nationality" = 'grenada'