Two men, both wearing bright yellow vests and jeans, are working on a roof.
Construction workers using nail guns, nail down shingles.
What sentence two offers changes the whole picture. We now know they are using nail guns, as construction workers and doing shingles.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(n_jeans(x5) & n_vest(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_yellow(s2) & Theme(s2,x3) & a_bright(s1) & Theme(s1,x3) & Actor(e1,x3) & v_wear(e1) & on(e2,x6) & n_roof(x6) & Actor(e2,x1) & v_work(e2) & subset_of(x3,x1) & subset_of(x2,x1) & n_man(x2) & card_eq_2(x2))
exists e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_use(e1) & rel(x4,x6) & down(x6,x7) & n_shingle(x7) & n_nail(x6) & n_gun(x4) & of(x4,x5) & n_nail(x5) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))