human
Solve the following python programming problem given the following code:
def _wormbase_extract(self) : 
    wbid = self._fields ['wormbase'] 
    def wbRequest(ident, field) : 
        return _json_request (((('http://api.wormbase.org/rest/widget/paper/' + wbid) + '/') + field)) 
j = wbRequest (wbid, 'authors') 
    if ('fields' in j) : 
        f = j ['fields'] 
        if ('data' in f) : 
            self.author ([x ['label'] for x in f ['data']]) 
else : 
            if ('name' in f) : 
                self.author (f ['name'] ['data'] ['label']) 
j = wbRequest (wbid, 'publication_date') 
    if ('fields' in j) : 
        f = j ['fields'] 
        if ('data' in f) : 
            self.year (f ['data'] ['label']) 
else : 
            if ('name' in f) : 
                self.year (j ['name'] ['data'] ['label']) 

    
    

    Fix the buggy line: self.year (j ['name'] ['data'] ['label'])
assistant
#Here is Python code to fix the buggy line: self.

self.year (f ['name'] ['data'] ['label'])