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_80 (singapore INTEGER, london INTEGER)
### Question:
What is the average Singapore value with a London value less than 0?
### Answer:
SELECT AVG(singapore) FROM table_name_80 WHERE london < 0