A crowd of people watching a fellow on a unicycle at night.
A man is putting on a performance on the street.
It is entirely possible for someone to just want to ride a unicycle, there is nothing in the information provided that would lead one to assume that this man is putting on a performance; likewise, unicycles, like bicycles, can be ridden on many types of terrain, they cannot only be ridden on the street.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & of(x1,x2) & at(e1,x6) & n_night(x6) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & on(x4,x5) & n_unicycle(x5) & n_fellow(x4) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists e1 x1 x2 x3 x4.(n_street(x4) & on(e1,x3) & on(x3,x4) & n_performance(x3) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_thing(x2) & n_man(x1))