How many neighborhoods are there in the community area of Lincoln Square?
the community area of Lincoln Square refers to community_area_name = 'Lincoln Square'
SELECT COUNT(T3.community_area_no) FROM ( SELECT T1.community_area_no FROM Community_Area AS T1 INNER JOIN Neighborhood AS T2 ON T1.community_area_no = T2.community_area_no WHERE community_area_name = 'Lincoln Square' GROUP BY T1.community_area_no ) T3