def METHOD_NAME(self, tag):
    if tag == "tr":
        row = self._currrow
        self._currrow = []
        if len(row) == 7 and row[0] == "Fission" and row[1] == "product":
            self._fromnucs = [nucname.id(x) for x in row[-4:]]
            return
        if len(row) != 6:
            return
        if row[0].endswith("FP"):
            return
        tonuc = nucname.id(row[0].split("-", 1)[1])
        self.fission_product_yields += zip(
            self._fromnucs, [tonuc] * 4, map(float, row[-4:])
        )