premise: A waitress is serving customers at a restaurant.
hypothesis: A waitress is doing her job at the restaurant.
explanation_1: a waitresses job is to serve customers at a restaurant
explanation_2: A waitress' job is to serve customers, therefore if she is serving customers then she is doing her job.
explanation_3: serving customers is a way of  doing her job.
premise_logic: exists e1 x1 x2 x3.(at(e1,x3) & n_restaurant(x3) & Theme(e1,x2) & Actor(e1,x1) & v_serve(e1) & n_customer(x2) & n_waitress(x1))
hypothesis_logic: exists e1 x1 x2 x3.(n_restaurant(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & at(x2,x3) & n_job(x2) & of(x2,x1) & n_female(x1) & n_waitress(x1))