What is every value for Under-13 when value for Under-15 is Maria Elena Ubina?
CREATE TABLE table_26368963_2 (
    under_13 VARCHAR,
    under_15 VARCHAR
)
SELECT under_13 FROM table_26368963_2 WHERE under_15 = "Maria Elena Ubina"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is every value for Under-13 when value for Under-15 is Maria Elena Ubina? ### Input: CREATE TABLE table_26368963_2 (
    under_13 VARCHAR,
    under_15 VARCHAR
) ### Response: SELECT under_13 FROM table_26368963_2 WHERE under_15 = "Maria Elena Ubina"