Chabad.org — English translation + Rashi
Torah Temimah (Sukkah 25a / Sifrei): those men who were tamei by a human soul — identification of who they were.
English: As it was taught: “And there were men who were tamei by a human soul…” — who were those men? They were the bearers of Yosef’s coffin, according to Rabbi Yosei HaGelili.
Identification of the claimants — the verse’s anonymous “those men” receives a named historical identity in the baraita.
Even those engaged in the highest form of chesed must still seek a path back into the communal korban when they become tamei.