What is the cmi cross reference id that is related to at least one council tax entry? List the cross reference id and source system code.
CREATE TABLE parking_fines (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE benefits_overpayments (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE business_rates (
    business_rates_id number,
    cmi_cross_ref_id number
)

CREATE TABLE rent_arrears (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE electoral_register (
    electoral_register_id number,
    cmi_cross_ref_id number
)

CREATE TABLE cmi_cross_references (
    cmi_cross_ref_id number,
    master_customer_id number,
    source_system_code text
)

CREATE TABLE council_tax (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE customer_master_index (
    master_customer_id number,
    cmi_details text
)
SELECT T1.cmi_cross_ref_id, T1.source_system_code FROM cmi_cross_references AS T1 JOIN council_tax AS T2 ON T1.cmi_cross_ref_id = T2.cmi_cross_ref_id GROUP BY T1.cmi_cross_ref_id HAVING COUNT(*) >= 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the cmi cross reference id that is related to at least one council tax entry? List the cross reference id and source system code. ### Input: CREATE TABLE parking_fines (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE benefits_overpayments (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE business_rates (
    business_rates_id number,
    cmi_cross_ref_id number
)

CREATE TABLE rent_arrears (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE electoral_register (
    electoral_register_id number,
    cmi_cross_ref_id number
)

CREATE TABLE cmi_cross_references (
    cmi_cross_ref_id number,
    master_customer_id number,
    source_system_code text
)

CREATE TABLE council_tax (
    council_tax_id number,
    cmi_cross_ref_id number
)

CREATE TABLE customer_master_index (
    master_customer_id number,
    cmi_details text
) ### Response: SELECT T1.cmi_cross_ref_id, T1.source_system_code FROM cmi_cross_references AS T1 JOIN council_tax AS T2 ON T1.cmi_cross_ref_id = T2.cmi_cross_ref_id GROUP BY T1.cmi_cross_ref_id HAVING COUNT(*) >= 1