Find the total checkins in " Brighton Heights " neighbourhood
SELECT SUM ( t3.count ) FROM checkin AS t3 JOIN business AS t1 ON t3.business_id  =  t1.business_id JOIN neighbourhood AS t2 ON t2.business_id  =  t1.business_id WHERE t2.neighbourhood_name  =  "Brighton Heights";
SELECT SUM ( t3.count ) FROM checkin AS t3 JOIN business AS t1 ON t3.business_id  =  t1.business_id JOIN neighbourhood AS t2 ON t2.business_id  =  t1.business_id WHERE t2.neighbourhood_name  =  "Brighton Heights";
[{'SUM ( t3.count )': None}]