 where RECIP is the type \({\langle}1,2{\rangle}\) quantifier defined in \eqref{ex-qlist4}. That is, there is a set of five Boston pitchers such that if you take any two of those, either they sit next to each other, or there is one pitcher, or two, or at most three (all in the chosen set), between them. Similarly for  (39b).  This is just one of several constructions of polyadic quantifiers that occur in reciprocal  sentences.[34]