Table: european film award for best short film
Question: What is the most common nominating festival for the European Film Award for Best Short Film?
Step 1 (Operation, Indexing): nominating festival
Step 2 (Operation, Grouping): nominating festival
Step 3 (Reasoning, Aggregating): COUNT, nominating festival
Step 4 (Reasoning, Aggregating): MAX, nominating festival
Answer: prix uip valladolid