Table: roberta vinci
Question: Was Sara Errani the only partner that Roberta Vinci had during the championships listed in the table? Answer with only 'Yes' or 'No' that is most accurate and nothing else.
Step 1 (Operation, Indexing): partner
Step 2 (Operation, Filter): partner
Step 3 (Operation, Grouping): partner
Step 4 (Reasoning, Reasoning with Quantifiers): existential, other partner
Answer: Yes