Question: What is the Lower index Kcal/ Nm 3 entry, for the row with entries of an Upper index Kcal/ Nm 3 smaller than 19,376, and a Lower index MJ/ Nm 3 of 74.54?
SQL: SELECT AVG Lower index Kcal/ Nm 3 FROM table WHERE Lower index MJ/ Nm 3 = 74.54 AND Upper index Kcal/ Nm 3 < 19,376