user: Question: How many 5+/inns have tyron henderson as the player, with wickets less than 21?
Columns: ['Player', 'Team', 'Matches', 'Overs', 'Runs', 'Wickets', 'Best', 'Econ', 'S/Rate', '4/inns', '5+/inns', 'Average']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Yasir Arafat', 'Kent Spitfires', 13.0, 44.0, 341.0, 23.0, '4/17', 7.75, 11.48, 2.0, 0.0, 14.82]
SQL:

assistant: SELECT "5+/inns" FROM "Table" WHERE "Player" = 'tyron henderson' AND "Wickets" < 21.0;