Table schema:
CREATE TABLE candidates (candidate_id VARCHAR); CREATE TABLE people (cell_mobile_number VARCHAR, person_id VARCHAR); CREATE TABLE candidate_assessments (candidate_id VARCHAR, asessment_outcome_code VARCHAR)

Question: Find the cell mobile number of the candidates whose assessment code is "Fail"?
SQL: SELECT T3.cell_mobile_number FROM candidates AS T1 JOIN candidate_assessments AS T2 ON T1.candidate_id = T2.candidate_id JOIN people AS T3 ON T1.candidate_id = T3.person_id WHERE T2.asessment_outcome_code = "Fail"