CREATE TABLE table_26902 ("Items" CLOB, "2008 - Q1" CLOB, "2008-Q2" CLOB, "2008-Q3" CLOB, "extrapol. 08" CLOB, "year 2007" CLOB)

Name the year 2007 for 668 being 2008-q1
SELECT "year 2007" FROM table_26902 WHERE "2008 - Q1" = '668'
SELECT "year 2007" FROM "table_26902" WHERE "2008 - Q1" = '668'