neurosynth/base/lexparser.py
def p_list_and(self, p):
        'list : list AND list'
        p[0] = pd.concat(
            [p[1], p[3]], axis=1).dropna().apply(self.func, axis=1)
def p_list_and(self, p):
        'list : list AND list'
        p[0] = pd.concat(
            [p[1], p[3]], axis=1).dropna().apply(self.func, axis=1)
list : list AND list