A long-haired, blond, man enjoys a soda while sitting on the grass with a group of people.
The people are having a picnic
People enjoying a soda while sitting on the grass with a group of people are not necessarily having a picnic.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5.(n_grass(x3) & while(e1,e2) & with(e2,x4) & of(x4,x5) & n_people(x5) & n_group(x4) & on(e2,x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_soda(x2) & n_man(x1) & a_,(s4) & Theme(s4,x1) & a_blond(s3) & Theme(s3,x1) & a_,(s2) & Theme(s2,x1) & a_long-haired(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_picnic(x2))