@property
def extended_summary(self):
    if ((not self.doc['Extended Summary']) and (len(self.doc['Summary']) > 1)):
        return ' '.join(self.doc['Summary'])
    return ' '.join(self.doc['Extended Summary'])
@property
def extended_summary(self):
    if ((not self.doc['Extended Summary']) and (len(self.doc['Summary']) > 1)):
        return ' '.join(self.doc['Summary'])
    return ' '.join(self.doc['Extended Summary'])