// MLN for Information Extraction of Citations
Token(token, position, citation)
InField(position, field, citation)
SameField(field, citation, citation)
SameCitation(citation, citation)

Token(+t, i, c) => InField(i, +f, c)

InField(i, +f, c) <=> InField(i+1, +f, c)

f != f' => (!Infield(i, +f, c) v !InField(i, +f', c))

Token(+t, i, c) ^ InField(i, +f, c) ^ Token(+t, i', c')
  ^ InField(i', +f, c') => SameField(+f, c, c')

SameField(+f, c, c') <=> SameCitation(c, c')

SameField(f, c, c') ^ SameField(f, c', c'') => SameField(f, c, c'')

SameCitation(c, c') ^ SameCitation(c', c'') => SameCitation(c, c'')