Table schema:
CREATE TABLE table_name_93 (upper_index_kcal__nm_3 INTEGER, lower_index_mj__nm_3 VARCHAR, upper_index_mj__nm_3 VARCHAR)

Question: 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?
SQL: 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