CREATE TABLE table_name_4 (internet_explorer VARCHAR, opera VARCHAR, period VARCHAR)

What internet explorer has 1.67% as the opera, with 2012 q1 as the period?
SELECT internet_explorer FROM table_name_4 WHERE opera = "1.67%" AND period = "2012 q1"
SELECT "internet_explorer" FROM "table_name_4" WHERE "1.67%" = "opera" AND "2012 q1" = "period"