xsd:string A Cause or Agent causes an Undergoer to undergo a change of phase. The Result of the change may be given, along with the InitialState and the Circumstances under which the change can occur. Note that this frame contrasts with CauseChangeOfConsistency in that this frame describes causation of a change of an Undergoer between different phases (i.e. solid to liquid or frozen to "unfrozen"). Bob melted the butter. Sally defrosted the chicken to eat for dinner.