14969
Our previous findings showed that the hydrophilic PARP inhibitor PJ34 enhances the sensitivity of p53 proficient MCF7 breast carcinoma cells to topotecan , a DNA Topoisomerase I ( TOP 1 ) inhibitor .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None