Being exposed to hot sun like this can cause skin cancer.
Skin cancer cannot be caused by the sun.
Being exposed to hot sun can cause skin cancer can not be true if skin cancer cannot be caused by the sun.
exists e1 e2 p1 s1 x1 x2.(exists e3 x3 x4.(Theme(e3,x3) & Actor(e3,e1) & v_cause(e3) & n_cancer(x3) & of(x3,x4) & n_skin(x4)) & Topic(e2,p1) & Actor(e2,e1) & v_can(e2) & to(e1,x2) & like(x2,x1) & n_thing(x1) & n_sun(x2) & a_hot(s1) & Theme(s1,x2) & Theme(e1,x1) & v_expose(e1))
exists x1 x2 x3.(n_sun(x3) & -exists e1 p1.(exists e2.(Actor(e2,x3) & Theme(e2,x1) & v_cause(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1)) & n_cancer(x1) & of(x1,x2) & n_skin(x2))