'E $$\times$$ F' means 'E is the wife of F'
'E $$+$$ F' means 'E is the brother of F'
'E $$\div$$ F' means 'E is the husband of F'
'E $$-$$ F' means 'E is the son of F'
How is J related to H in the expression '$$G \times H + I - J \div K$$'?
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