Three men working on some sort construction or repair.
Three men are building a patio.
Working does not specify whether someone is building, destroying, or repairing something.
exists e1 x1 x2.(a_topic(x1) & (exists x3 x4.(on(e1,x3) & n_construction(x3) & of(x3,x4) & n_sort(x4)) | exists x5.(on(e1,x5) & n_repair(x5))) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1) & card_eq_3(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_patio(x2) & n_man(x1) & card_eq_3(x1))