user: Question: What is Vuelta a Ecuador's lowest UCI Rating?
Columns: ['Date', 'Race Name', 'Location', 'UCI Rating', 'Winner', 'Team']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['7–14 October', 'Clasico Ciclistico Banfoandes', 'Venezuela', 2.2, 'Sergio Luis Henao ( COL )', 'Colombia és Pasión Coldeportes']
SQL:

assistant: SELECT MIN("UCI Rating") FROM "Table" WHERE "Race Name" = 'Vuelta a Ecuador';