Workers with white t-shirts measure a wooden board.
Workers ensure a board will fit in the house they're constructing.
Just because they are workers wearing white t-shirts does not mean that they are constructing a house.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_measure(e1) & n_board(x3) & a_wooden(s2) & Theme(s2,x3) & with(x1,x2) & n_t-shirt(x2) & a_white(s1) & Theme(s1,x2) & n_worker(x1))
exists e1 p1 x1 x3.(n_thing(x3) & n_house(x3) & exists e3 e2 x2 x4.(in(e2,x3) & Theme(e3,x4) & Actor(e3,x3) & v_construct(e3) & (x3 = x4) & Actor(e2,x2) & v_fit(e2) & n_board(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_ensure(e1) & n_worker(x1))