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 singer_in_concert (singer_id VARCHAR); CREATE TABLE singer (name VARCHAR, singer_id VARCHAR)
### Question:
List singer names and number of concerts for each singer.
### Answer:
SELECT T2.name, COUNT(*) FROM singer_in_concert AS T1 JOIN singer AS T2 ON T1.singer_id = T2.singer_id GROUP BY T2.singer_id