CREATE TABLE table_18106 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB, "Candidates" CLOB)

What year was Luis Gutierrez election
SELECT MIN("First elected") FROM table_18106 WHERE "Incumbent" = 'Luis Gutierrez'
SELECT MIN("First elected") FROM "table_18106" WHERE "Incumbent" = 'Luis Gutierrez'