These people are sitting outside on a sunny day.
People enjoying the sun while relaxing.
Sitting outside on a sunny day does not imply enjoying the sun.
exists e1 s1 s2 x1 x2.(n_people(x1) & on(e1,x2) & n_day(x2) & a_sunny(s2) & Theme(s2,x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))
exists e2 e1 x1 x2 x3.(n_sun(x3) & a_topic(x1) & while(e1,e2) & Actor(e2,x2) & v_relax(e2) & Theme(e1,x3) & Actor(e1,x2) & v_enjoy(e1) & (x1 = x2) & n_people(x1))