Question: What is the last name of the brothers who wrote a song sung by one of Mowgli's mentors in The Jungle Book?

Context paragraphs:
The Second Jungle Book: Mowgli &amp; Baloo: The Second Jungle Book: Mowgli & Baloo is a 1997 American adventure film starring Jamie Williams as Mowgli, with Roddy McDowall and Billy Campbell in supporting roles.  It is a live action adaptation of Rudyard Kipling's "The Jungle Book" (not based on "The Second Jungle Book", as its title would suggest).  The film was adapted for the screen by Bayard Johnson and Matthew Horton.

Raksha (The Jungle Book): Raksha (Hindi: रक्षा / "Rakṣā" or Mother Wolf as initially named) is a fictional character featured in Rudyard Kipling's Mowgli stories, collected in "The Jungle Book" and "The Second Jungle Book".  She is a female Indian wolf, member of the Seeonee pack, who while suckling her own cubs decides also to adopt a human "cub" that her mate Father Wolf has found wandering in the jungle, naming him "Mowgli" (which means "frog" in the Speech of the Jungle) because of his hairlessness.

Mowgli: The New Adventures of the Jungle Book: Mowgli: The New Adventures of the Jungle Book is an American live action television series based on the Mowgli stories from the Rudyard Kipling novels, "The Jungle Book" and "The Second Jungle Book".  A contemporary adaptation, the series has Mowgli joined on his adventures by a young American girl named, Nahbiri, who has accompanied her widowed doctor father to Jabalpur, India.  The show was created by Timothy Scott Bogart, Guy Toubes, and James Hereth and produced by Wolfcrest Entertainment and Franklin/Waterman Worldwide, and distributed internationally by Alliance Entertainment.  It premiered on the Fox Kids Network in the United States on February 7, 1998 and ran until March 21, 1998.

The Second Jungle Book: The Second Jungle Book is a sequel to "The Jungle Book" by Rudyard Kipling.  First published in 1895, it features five stories about Mowgli and three unrelated stories, all but one set in India, most of which Kipling wrote while living in Vermont.  All of the stories were previously published in magazines in 1894-5, often under different titles.  The original book is now worth $3.4 million.  The 1994 film "The Jungle Book" used this book as a source.

Kaa: Kaa is a fictional character from "The Jungle Book" stories written by Rudyard Kipling.  Kaa is one of Mowgli's mentors and friends.  However, there are some versions where he's antagonistic.

Trust in Me (The Python's Song): "Trust in Me (The Python's Song)" is a song in the widely popular Walt Disney film, "The Jungle Book", from 1967.  The song was sung by Sterling Holloway playing the part of "Kaa, the snake".  The song was written by Disney staff songwriters, Robert and Richard Sherman.  In the song, Kaa hypnotizes Mowgli, into a calm, soothing, relaxing trance.  As the song concludes, Kaa readies himself to devour the boy, only to be stopped by Shere Khan the tiger in his search for Mowgli.

All the Mowgli Stories: All the Mowgli Stories is a collection of short stories by Rudyard Kipling.  As the title suggests, the book is a chronological compilation of the stories about Mowgli from "The Jungle Book" and "The Second Jungle Book", together with "In the Rukh" (the first Mowgli story written although the last in chronological order).  The book also includes the epigrammatic poems added to the stories for their original book publication.  All of the stories and poems had originally been published between 1893 and 1895.

Baloo: Baloo (Hindi: भालू "Bhālū", "bear") is a main fictional character featured in Rudyard Kipling's "The Jungle Book" from 1894 and "The Second Jungle Book" from 1895.  Baloo, a bear, is the strict teacher of the cubs of the Seeonee wolf pack.  His most challenging pupil is the "man-cub" Mowgli.  Baloo and Bagheera, a panther, save Mowgli from Shere Khan the tiger and endeavor to teach Mowgli the Law of the Jungle in many of "The Jungle Book" stories.

Akela (The Jungle Book): Akela (Hindi: अकेला / "Akelā" also called The Lone Wolf or Big Wolf) is a fictional character in Rudyard Kipling's stories, "The Jungle Book" and "The Second Jungle Book".  He is the leader of the Seeonee pack of Indian wolves and presides over the pack's council meetings.  It is at such a meeting that the pack adopts the lost child Mowgli and Akela becomes one of Mowgli's mentors.

The Bare Necessities: "The Bare Necessities" is a song, written by Terry Gilkyson, from the animated 1967 Disney film "The Jungle Book", sung by Phil Harris as Baloo and Bruce Reitherman as Mowgli.  Originally, it was written for an earlier draft of the movie that was never produced.  The Sherman Brothers, who wrote the other songs of the film, kept this as the only song used from the previous version.  A reprise of the song was sung by Sebastian Cabot as Bagheera and Phil Harris as Baloo at the end of the film.  Van Dyke Parks worked on the arrangement, which was his first paid gig after moving to California.  The song was also sung by Louis Armstrong.  In 1967, "The Bare Necessities" was nominated for an Academy Award for Best Original Song.  A hip-hop version of the song performed by Lou Rawls was used as the theme song for "Jungle Cubs".

Supporting paragraphs: Trust in Me (The Python's Song) Kaa
Answer: Sherman