A tired businessman takes a quick nap while riding the train.
A man is slacking on the job.
A tired businessman taking a quick nap isn't necessarily slacking on the job.
exists e2 e1 s1 s2 x1 x2 x3.(n_train(x3) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_nap(x2) & a_quick(s2) & Theme(s2,x2) & n_businessman(x1) & a_tired(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_job(x2) & on(e1,x2) & Actor(e1,x1) & v_slack(e1) & n_man(x1))