parent q1 q2 q3 q4
father 2 1 3 1
mother 1 3 1 1
father 2 1 3 1
mother 3 2 3 3
mother 3 3 2 1
mother 1 3 3 1
mother 3 3 1 1
mother 2 3 1 1
mother 1 3 3 1
mother 3 3 3 3
mother 3 3 2 3
mother 3 3 1 2
mother 1 2 2 2
mother 3 3 2 1
mother 3 3 3 1
father 1 1 1 3
mother 1 1 2 1
mother 3 3 3 1
father 2 1 1 1
mother 3 3 1 1
mother 3 3 1 1
mother 3 3 3 1
mother 2 2 1 3
mother 3 3 2 3
mother 3 3 2 3
mother 1 3 1 2
father 2 1 1 3
mother 3 3 3 1
mother 2 3 1 1