What was the surface for Adrian Ungur as an opponent?
CREATE TABLE table_name_86 (surface VARCHAR, opponent VARCHAR)
SELECT surface FROM table_name_86 WHERE opponent = "adrian ungur"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_86 (surface VARCHAR, opponent VARCHAR) Question: What was the surface for Adrian Ungur as an opponent? [/INST] SELECT surface FROM table_name_86 WHERE opponent = "adrian ungur" </s>