Both the Lebanese Forces and the PSP / PLA were accused of committing massacres and atrocities against one another as tit-for-tat ( revenge killings ) .
CCONJ DET ADJ PROPN CCONJ DET PROPN SYM PROPN AUX VERB ADP VERB NOUN CCONJ NOUN ADP NUM DET ADP PROPN ( NOUN NOUN ) .