Incorrect Answer.
The formula 
x y (S(x,m) 
H(c,y) 
x = y)
- "decompiles" into 'For all x and y, if x is Monique's sister and
Carl is the husband of y, then x and y are the same (person)'.
- More elegantly, we can re-express this as
'Carl is Monique's brother or husband'.
Evidently, this is not the sentence we sought to express, for it does not
even guarantee such that x and y exist (let alone that they would help us
in successfully coding "brother-in-law").
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