Table schema:
CREATE TABLE scientists (ssn VARCHAR, name VARCHAR, SSN VARCHAR); CREATE TABLE projects (code VARCHAR, hours INTEGER); CREATE TABLE assignedto (project VARCHAR, scientist VARCHAR); CREATE TABLE projects (hours INTEGER)

Question: Find the SSN and name of scientists who are assigned to the project with the longest hours.
SQL: SELECT T3.ssn, T3.name FROM assignedto AS T1 JOIN projects AS T2 ON T1.project = T2.code JOIN scientists AS T3 ON T1.scientist = T3.SSN WHERE T2.hours = (SELECT MAX(hours) FROM projects)