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_42 (weight__kg_ VARCHAR, race VARCHAR)
### Question:
What was the combined weight in kilograms of the horses in the race at Chelmsford stakes?
### Answer:
SELECT COUNT(weight__kg_) FROM table_name_42 WHERE race = "chelmsford stakes"