Three male construction workers on a roof working in the sun.
Three people working in daylight
Three people is a rephrasing of three male construction workers.  In the sun, implies daylight.
exists e1 s1 x1 x2 x3 x4 x5.(n_sun(x5) & a_topic(x1) & on(x1,x3) & in(e1,x5) & Actor(e1,x4) & v_work(e1) & (x3 = x4) & n_roof(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2) & a_male(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_daylight(x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))