premise: Several people are picketing oil.
hypothesis: Nobody is here.
explanation_1: A picture cannot be of both several people and nobody.
explanation_2: People refers to somebodies, therefore is the opposite of nobody.
explanation_3: If several people are picketing oil, then is cannot be claimed that nobody is here.
premise_logic: exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_picket(e1) & n_oil(x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
hypothesis_logic: -exists s1 x1.(Theme(s1,x1) & a_here(s1) & n_person(x1))