Table: catamaran_specs
Columns: model
length_over_all
beam
sail_area
crew
comments

Question: Which Comments has a Length Over All of 4.5m?
SQL: SELECT "comments" FROM catamaran_specs WHERE "length_over_all" = '4.5m'

Question: Which Crew has Comments of daggerboards. design: roy seaman?
SQL: SELECT "crew" FROM catamaran_specs WHERE "comments" = 'daggerboards. design: roy seaman'

Question: Which Comments has a Model of 18sq?
SQL: SELECT "comments" FROM catamaran_specs WHERE "model" = '18sq'

Question: Which Model has Comments of curved daggerboards. design: morelli und melvin?
SQL: SELECT "model" FROM catamaran_specs WHERE "comments" = 'curved daggerboards. design: morelli und melvin'

Question: Which Beam has a Model of 570?
SQL: SELECT "beam" FROM catamaran_specs WHERE "model" = '570'

Question: Which Model has a Sail Area of 24.5 m²?
SQL: SELECT "model" FROM catamaran_specs WHERE "sail_area" = '24.5 m²'