human
Solve the following python programming problem given the following code:
def _to_containers(self, things) : 
    'Transform a list of "things", container names or service names, to
        an expended list of Container objects.' 
    def parse_thing(s) : 
        if (s in self.containers) : 
            return [self.containers [s]] 
else : 
            if (s in self.services) : 
                return self.services [s].containers 
raise exceptions.OrchestrationException ('{} is neither a service nor a container!'.format (s)) 
result = [] 
    for thing in things : 
        result += parse_thing (thing) 
return sorted (set (thing)) 

    
    

    Fix the buggy line: return sorted (set (thing))
assistant
#Here is Python program to fix the buggy line: return sorted (set (thing))
.

return sorted (set (result))