The GT26CW-2 made its debut in 1972 , but by the mid-1980s , two new designations were added based on mechanical/electrical improvements after the -2 suffix : Type A and Type B .
DET PROPN VERB PRON NOUN ADP NUM , CCONJ ADP DET NOUN , NUM ADJ NOUN AUX VERB VERB ADP ADJ NOUN ADP DET NOUN NOUN : PROPN PROPN CCONJ PROPN PROPN .