Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_15417439_1 (length VARCHAR, genus_species VARCHAR)
### Question:
For the genus/species arabidopsis thaliana, what are the lengths? 
### Answer:
SELECT length FROM table_15417439_1 WHERE genus_species = "Arabidopsis thaliana"