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_238124_1 (prothrombin_time VARCHAR, condition VARCHAR)
### Question:
What is the prothrombin time of von willebrand disease? 
### Answer:
SELECT COUNT(prothrombin_time) FROM table_238124_1 WHERE condition = "Von Willebrand disease"