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_name_6 (isotopic_mass___u__ VARCHAR, nuclide VARCHAR)
### Question:
What is the isotopic mass (u) when the nuclide is 89 y?
### Answer:
SELECT isotopic_mass___u__ FROM table_name_6 WHERE nuclide = "89 y"