Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_87 (round INTEGER, event VARCHAR, location VARCHAR, method VARCHAR)

### Question ###
What is the lowest Round with the Location, Las Vegas, Nevada, the Method, Decision (unanimous), and the Event, K-1 World Grand Prix 2003 in Las Vegas II?

### Accurate SQL ###

SELECT MIN(round) FROM table_name_87 WHERE location = "las vegas, nevada" AND method = "decision (unanimous)" AND event = "k-1 world grand prix 2003 in las vegas ii"