19487
Loss of phosphatases such as PTEN ( phosphatase and tensin homologue deleted on chromosome 10 ) , a known tumour suppressor , across tumour types lends credence to the development of phosphatidylinositol 3 - - kinase inhibitors alongside the use of phosphatase expression as a biomarker , though phase 3 trial data are lacking .
 Chemical: phosphatidylinositol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: phosphatidylinositol