Given the following relations:
'P Q' \( \times \) means 'P is mother of Q',
'P Q' \( \div \) means 'P is sister of Q',
'P Q' \( + \) means 'P is brother of Q',
'P Q' \( - \) means 'P is father of Q'.
Find how 'K' is related to 'D' in the expression \( D \, F \, T \, K \div - + \)?