Predicate: titration
Roleset id: titration.01 , Measuring the amount of a constituent in a solution, vncls: , framnet:
Roles:
        Arg0: Measurer
        Arg1: Chemical/Drugs
        Arg2: Starting point before titration
        Arg3: End point after titration
Example: Arg0,1
        person: ns,  tense: ns,  aspect: ns,  voice: ns,  form: ns
        A student began his titration of HCl with NaOH with an airbubble in the buret tip
        Arg0: his
        Rel: titration
        Arg1: of HCl with NaOH