It was observed in the Cassiopeia A supernova remnant and SN 1987A at a relatively high concentration , a consequence of delayed decay resulting from ionizing conditions .
PRON AUX VERB ADP DET PROPN NOUN VERB NOUN CCONJ PROPN NUM ADP DET ADV ADJ NOUN , DET NOUN ADP VERB NOUN VERB ADP VERB NOUN .