(S (S (S (BASENP (NNP CN) (NNP Rail)) (VP (VBD used) (S (VP (TO to) (VP (VB have) (NP (BASENP (JJ part-time) (NNS positions)) (VP (VBN filled) (ADVP (RB as) (RB well))))))))) (CONJP (COMMA ,) (CC but)) (S (PP (IN at) (BASENP (DT this) (NN time))) (S (S (NP (EX there)) (VP (VBP are) (NP (BASENP (DT no) (JJ part-time) (NNS employees)) (SBAR (S (VP (TO to) (VP (VB cover) (BASENP (NN work))))))))) (SBAR (IN if) (S (BASENP (DT a) (JJ full-time) (NN employee)) (VP (VBZ is) (ADJP (JJ absent)))))))) (PERIOD .))