What is the number  of the series written by Teresa Lin? 
CREATE TABLE table_26801821_1 (no_in_series VARCHAR, written_by VARCHAR)
SELECT COUNT(no_in_series) FROM table_26801821_1 WHERE written_by = "Teresa Lin"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26801821_1 (no_in_series VARCHAR, written_by VARCHAR) Question: What is the number  of the series written by Teresa Lin?  [/INST] SELECT COUNT(no_in_series) FROM table_26801821_1 WHERE written_by = "Teresa Lin" </s>