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 WHERE Lower index MJ/ Nm 3 = 47.91 AND Upper index MJ/ Nm 3 > 53.28