SELECT "Call sign" FROM table_77344 WHERE "State" = 'florida' AND "Frequency" = '90.9 fm'
What is the call sign for 90.9 FM which is in Florida?
CREATE TABLE table_77344 (
    "Call sign" text,
    "Frequency" text,
    "City of license" text,
    "State" text,
    "FCC info" text
)