Being exposed to hot sun like this can cause skin cancer.
Using sunblock may prevent diseases
The fact that hot sun causes causes skin cancer doesn't determine that sunblock can prevent diseases.
exists e2 e1 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 e2 e1 p1 x1 x2.(exists e3 x3.(Theme(e3,x3) & Actor(e3,e1) & v_prevent(e3) & n_disease(x3)) & Topic(e2,p1) & Actor(e2,e1) & v_may(e2) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_sunblock(x2) & n_thing(x1))