user: Question: What's the length of the route with junctions of UR 1472 SH 255?
Columns: ['Route Name', 'Direction', 'Termini', 'Junctions', 'Length', 'Population Area']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['FM 649', 'South North', 'Zapata County SH 359', 'SH 359', 'miles (km)', 'Mirando City']
SQL:

assistant: SELECT "Length" FROM "Table" WHERE "Junctions" = 'UR 1472 SH 255';