The beast may ruin the objects.
The beast will be careful not to hurt the objects.
One may not ruin things when being careful.
exists e1 p1 x1 x2.(n_object(x2) & n_beast(x1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_ruin(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_may(e1))
exists x1 x2.(n_object(x2) & n_beast(x1) & -exists p1 s1.(Topic(s1,p1) & Actor(s1,x1) & a_careful(s1) & exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_hurt(e1))))