How to use the reynir.ifdtagger.IFD_Tagset function in reynir

def ifd_taglist_entity(txt):
            i = IFD_Tagset(c="entity", x=txt)
            return [(str(i), 1.0)]

def tag_stream(sentence_stream: Iterable[Iterable[Dict[str, Any]]]) -> Iterator[str]:
            """ Generator for tag stream from a token stream """
            for sent in sentence_stream:
                if not sent:
                    continue
                # For each sentence, start and end with empty strings
                for _ in range(n - 1):
                    yield ""
                for t in sent:
                    tag = None
                    # Skip punctuation
                    if t.get("k", TOK.WORD) != TOK.PUNCTUATION:
                        canonicalize_token(t)
                        tag = str(IFD_Tagset(t))
                        if tag:
                            self.lemma_cnt[t["x"]][tag] += 1
                    if tag:
                        yield tag
                for _ in range(n - 1):
                    yield ""

def ifd_tag(kind, txt, m):
            i = IFD_Tagset(
                k=TOK.descr[kind],
                c=m.ordfl,
                t=m.ordfl,
                f=m.fl,
                x=txt,
                s=m.stofn,
                b=m.beyging,
            )
            return str(i)

def ifd_tag_person(txt, p):
            i = IFD_Tagset(
                k="PERSON",
                c="person",
                g=p.gender,
                x=txt,
                s=p.name,
                t="person_" + p.gender + "_" + p.case,
            )
            return str(i)