which recipe is made in less than 15.0 and is created with 12.0 of the ingredient?
(AND food.recipe (AND (JOIN (R food.recipe_ingredient.recipe) (JOIN food.recipe_ingredient.quantity 12.0^^http://www.w3.org/2001/XMLSchema#float)) (le food.recipe.preparation_time 15.0^^http://www.w3.org/2001/XMLSchema#float)))