Proposition B would make it City policy to limit commercial and private events at Coit Tower and use revenues from its concessions for maintaining the tower and surrounding Pioneer Park .
PROPN PROPN AUX VERB PRON NOUN NOUN PART VERB ADJ CCONJ ADJ NOUN ADP PROPN PROPN CCONJ VERB NOUN ADP PRON NOUN ADP VERB DET NOUN CCONJ VERB PROPN PROPN .