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_name_88 (start_address VARCHAR, size_of_network_number_bit_field VARCHAR)
### Question:
What is the start address when the network number bit field is 16?
### Answer:
SELECT start_address FROM table_name_88 WHERE size_of_network_number_bit_field = "16"