S.I/Lisp/

_1_is_the_2_of_?.

A1="Women is the plural of woman."
A2="Up is the opposite of down."
A3="Cain is the brother of Abel."

=_1_is_the_2_of_?.("women", "plural", A1:A3)
-> "woman"

=_1_is_the_2_of_?.("up", "opposite", A1:A3)
-> "down"

=_1_is_the_2_of_?.("Cain", "brother", A1:A3)
-> "Abel"
        

DEFINE(
    _1_is_the_2_of_?.,
    LAMBDA(
        _1,
        _2,
        knowledgebase,
        LET(
            fragment,
                FORMAT(
                    "{1} is the {2} of ",
                    CAPITALIZE(_1),
                    _2),
            knowledgecolumn,
                TOCOL(knowledgebase),
            matches,
                FILTER(
                    knowledgecolumn,
                    BEGINSWITH?(
                        knowledgecolumn,
                        fragment)),
            IF(
                ISERROR(matches),
                FALSE,
                TRIMALL(
                    REGEXEXTRACT(
                        matches,
                        FORMAT(
                            "^{1} is the {2} of (.+)\.$",
                            CAPITALIZE(_1),
                            _2),
                        2))))))
        

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