CREATE TABLE table_name_93 (upper_index_kcal__nm_3 NUMBER, lower_index_mj__nm_3 VARCHAR2, upper_index_mj__nm_3 VARCHAR2)

What is the entry for Upper index Kcal/ Nm 3 for the row with an entry that has a Lower index MJ/ Nm 3 of 47.91, and an Upper index MJ/ Nm 3 larger than 53.28?
SELECT SUM(upper_index_kcal__nm_3) FROM table_name_93 WHERE lower_index_mj__nm_3 = 47.91 AND upper_index_mj__nm_3 > 53.28
SELECT SUM("upper_index_kcal__nm_3") FROM "table_name_93" WHERE "lower_index_mj__nm_3" = 47.91 AND "upper_index_mj__nm_3" > 53.28