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 table_name_2 (weight_at_birth VARCHAR, gender VARCHAR, nickname VARCHAR)

### Question ###
How much did the girl, nicknamed Chidi, weigh at birth?

### Accurate SQL ###

SELECT weight_at_birth FROM table_name_2 WHERE gender = "girl" AND nickname = "chidi"