A boy looks at his leather spike bracelet.
A boy is swimming.
If the boy is swimming, then he wouldn't be wearing a leather spike bracelet
exists e1 x1 x2 x3 x4.(at(e1,x2) & n_bracelet(x2) & of(x2,x4) & n_spike(x4) & of(x2,x3) & n_leather(x3) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_look(e1) & n_boy(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_swimming(x2)) & n_boy(x1))