sentence: Jain monks have to follow six duties known as avashyakas : sāmāyika ( practising serenity ) , chaturvimshati ( praising the tirthankara ) , vandan ( respecting teachers and monks ) , pratikramana ( introspection ) , kayotsarga ( stillness ) , and pratyakhyana ( renunciation ) .
question: who _ _ introspects _ in something ?
answers: Jain monks