Table schema:
CREATE TABLE table_name_31 (ngc_number INTEGER, object_type VARCHAR, right_ascension___j2000__ VARCHAR)

Question: I want the sum of NGC number for spiral galaxy and right acension of 08h14m40.4s
SQL: SELECT SUM(ngc_number) FROM table_name_31 WHERE object_type = "spiral galaxy" AND right_ascension___j2000__ = "08h14m40.4s"