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 settlements (claim_id VARCHAR, settlement_amount INTEGER); CREATE TABLE claims (Effective_Date VARCHAR, claim_id VARCHAR)
### Question:
What is the effective date of the claim that has the largest amount of total settlement?
### Answer:
SELECT t1.Effective_Date FROM claims AS t1 JOIN settlements AS t2 ON t1.claim_id = t2.claim_id GROUP BY t1.claim_id ORDER BY SUM(t2.settlement_amount) DESC LIMIT 1