A crowd gathers to watch the artist at work.
The artist is alone.
crowd is group of people whereas alone refers to single person
exists p1 x1 x2 x3.(n_artist(x3) & a_topic(x1) & Topic(x1,p1) & exists e1 x4.(at(e1,x4) & n_work(x4) & Theme(e1,x3) & Actor(e1,x1) & v_watch(e1)) & n_gather(x1) & of(x1,x2) & n_crowd(x2))
exists s1 x1.(n_artist(x1) & Theme(s1,x1) & a_alone(s1))