CREATE TABLE table_19930 ("Series Ep." CLOB, "Episode" FLOAT, "Segment A" CLOB, "Segment B" CLOB, "Segment C" CLOB, "Segment D" CLOB)

What are the titles of segment c when segment d is motorcycle brake locks?
SELECT "Segment C" FROM table_19930 WHERE "Segment D" = 'Motorcycle Brake Locks'
SELECT "Segment C" FROM "table_19930" WHERE "Segment D" = 'Motorcycle Brake Locks'