CREATE TABLE table_15109 ("Year" FLOAT, "\\u00c1lbum" TEXT, "Charts" TEXT, "Sales" FLOAT, "Certification" TEXT)

What is the chart number of the Requebra album with sales smaller than 32,000?
SELECT "Charts" FROM table_15109 WHERE "Sales" < '32,000' AND "\u00c1lbum" = 'requebra'
SELECT "Charts" FROM "table_15109" WHERE "Sales" < '32,000' AND "\u00c1lbum" = 'requebra'