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_16 (antiparticle_symbol VARCHAR, rest_mass___mev___c_2__ VARCHAR)
### Question:
What is the antiparticle symbol with a rest mess (mev/c2) of .47 ± .33?
### Answer:
SELECT antiparticle_symbol FROM table_name_16 WHERE rest_mass___mev___c_2__ = ".47 ± .33"