A gentleman walking in the street.
Gentleman walking
the gentleman is taking a walk in the street
exists s1 x1 x2.(n_street(x2) & a_topic(x1) & in(x1,x2) & n_walking(x1) & a_gentleman(s1) & Theme(s1,x1))
exists x1 x2.(n_walking(x1) & (x1 = x2) & ne_nam_gentleman(x2) & a_topic(x1))