Table: trina discography
Question: What is the average number of years between Trina's album releases?
Step 1 (Operation, Indexing): album
Step 2 (Operation, Grouping): album
Step 3 (Reasoning, Other Commonsense Reasoning): between Trina's album
Step 4 (Reasoning, Aggregating): AVG, years between Trina's album releases
Answer: 0.7