A gentleman walking in the street.
A man is going home.
A man went home while walking
exists s1 x1 x2.(n_street(x2) & a_topic(x1) & in(x1,x2) & n_walking(x1) & a_gentleman(s1) & Theme(s1,x1))
exists e1 x1 x2.(Time(e1,x2) & n_home(x2) & Actor(e1,x1) & v_go(e1) & n_man(x1))