Young people in yellow shirts prepare colorful food.
The people are eating.
The people can't be preparing the food if they are busy eating.
exists e1 s1 s2 s3 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_prepare(e1) & n_food(x3) & a_colorful(s3) & Theme(s3,x3) & in(x1,x2) & n_shirt(x2) & a_yellow(s2) & Theme(s2,x2) & n_people(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_eat(e1))