how many townships have at least a 0.50 water percentage ?
CREATE TABLE table_203_729 (
    id number,
    "township" text,
    "fips" number,
    "population\ncenter" text,
    "population" number,
    "population\ndensity\n/km2 (/sq mi)" text,
    "land area\nkm2 (sq mi)" text,
    "water area\nkm2 (sq mi)" text,
    "water %" text,
    "geographic coordinates" text
)
SELECT COUNT("township") FROM table_203_729 WHERE "water %" >= 0.50
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: how many townships have at least a 0.50 water percentage ? ### Input: CREATE TABLE table_203_729 (
    id number,
    "township" text,
    "fips" number,
    "population\ncenter" text,
    "population" number,
    "population\ndensity\n/km2 (/sq mi)" text,
    "land area\nkm2 (sq mi)" text,
    "water area\nkm2 (sq mi)" text,
    "water %" text,
    "geographic coordinates" text
) ### Response: SELECT COUNT("township") FROM table_203_729 WHERE "water %" >= 0.50