Young adults dressed casually walk around in a field.
The young adults are running around the field.
The people can either walk, or they are running. One or the other, not both.
exists e1 p1 s1 x1.(exists e2 s2 s3 x2.(in(e2,x2) & n_field(x2) & a_casually(s3) & Manner(e2,s3) & a_around(s2) & Manner(e2,s2) & Theme(e2,x1) & v_walk(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_dress(e1) & n_adult(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_field(x2) & n_adult(x1) & a_young(s1) & Theme(s1,x1) & around(e1,x2) & Actor(e1,x1) & v_run(e1))