what is the contact number of 'Woodstock discos' company? | The phone of the customer of the company 'Woodstock Discos' is +55 (11) 3033-5446. | What is the contact number of Mr. Eduardo Martins?
SELECT phone FROM customers WHERE first_name  =  "Eduardo" AND last_name  =  "Martins"
contact number refers to phone; company name 'Woodstock Discos' is a filter condition; first_name and last_name are used to identify a specific customer (Eduardo Martins);