Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE mill (architect_id VARCHAR)
TABLE: CREATE TABLE architect (id VARCHAR, name VARCHAR, gender VARCHAR)
TABLE: CREATE TABLE bridge (architect_id VARCHAR)

### Question ###
What are the ids, names and genders of the architects who built two bridges or one mill?

### Accurate SQL ###

SELECT T1.id, T1.name, T1.gender FROM architect AS T1 JOIN bridge AS T2 ON T1.id = T2.architect_id GROUP BY T1.id HAVING COUNT(*) = 2 UNION SELECT T1.id, T1.name, T1.gender FROM architect AS T1 JOIN mill AS T2 ON T1.id = T2.architect_id GROUP BY T1.id HAVING COUNT(*) = 1