If in a certain code language
(1) 'Chip Din Chunk' means 'Student attends class'
(2) 'Din Sunk Dink' means 'Arjun is student'
(3) 'Jump MInk Sink' means 'Schools are good'
(4) 'Dink Mup Chimp' means 'Teacher is teaching'
Which one of the above statements is not needed to determine the equivalent of 'Arjun' in the code?