How many points did the 49ers win by in the NFC championship against the Chicago Bears?
return the  49ers ;return the  Chicago Bears ;return points of #1 ;return points of #2 ;return #3 in  the  NFC championship ;return #4 in  the  NFC championship ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'filter', 'filter', 'arithmetic']