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_20297668_1 (standard_yarn_weight_system VARCHAR, wraps_per_inch__wpi_ VARCHAR)
### Question:
Name the standard yarn weight system for 7 wpi
### Answer:
SELECT standard_yarn_weight_system FROM table_20297668_1 WHERE wraps_per_inch__wpi_ = "7 wpi"