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_90 (opening_day_net_gross INTEGER, studio_s_ VARCHAR, year VARCHAR)
### Question:
What is the opening day net gross a Reliance Entertainment movie before 2011 had?
### Answer:
SELECT SUM(opening_day_net_gross) FROM table_name_90 WHERE studio_s_ = "reliance entertainment" AND year < 2011