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_19112_3 (industry VARCHAR, revenue__billion_$_ VARCHAR)
### Question:
Name the industry for revenue being 2.1
### Answer:
SELECT industry FROM table_19112_3 WHERE revenue__billion_$_ = "2.1"