title: Map<Integer,CorefChain> graph=document.get(CorefChainAnnotation.class) has some errors
body: <p>The statement in offical page of the Stanford CoreNLP "Map graph=document.get(CorefChainAnnotation.class) has some errors about type compatibility that is exactly incompatible types: "inference variable VALUE has incompatible bounds equality constraints: Map
      upper bounds: Map,Object
    where VALUE is a type-variable:
      VALUE extends Object declared in method get(Class>)" Any idea of this , parser version or type conversion?</p>