Table: 1988 winter olympics
Question: What is the ratio of silver medals to the sum of gold and bronze medals for countries with a rank of 10 or lower?
Step 1 (Operation, Indexing): rank
Step 2 (Operation, Filter): rank
Step 3 (Reasoning, Arithmetic): +, sum of gold and bronze
Step 4 (Reasoning, Arithmetic): /, silver medals to the sum of gold and bronze medals
Answer: 3:7