Task: Pos Tagging
Input (English): Sentence: For example , a set plaster mold that is to {{ be }} used for clay slip casting must be dry - it gets wet pulling the water out of the slip - while a set plaster mold used for molding wax must be soaking or damp wet http://www.mikegigi.com/castgobl.htm#LGGOBPROJ 
Word: be
Output (English): AUX