Boys playing tag football run down the field.
Boys sitting and reading
The boys cannot by playing tag football and sitting and reading simultaneously.
exists e1 x1 x2 x3 x4 x5 x6.(n_field(x6) & a_topic(x1) & down(e1,x6) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_run(x3) & of(x3,x5) & n_football(x5) & of(x3,x4) & n_tag(x4) & (x1 = x2) & n_boy(x1))
exists e1 s1 x1 x2 x3.(a_topic(s1) & subset_of(x3,s1) & n_read(x3) & subset_of(x1,s1) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_boy(x1))