Question: Leo Sidran co-produced "Al Otro Lado Del Rio" for the soundtrack to a movie about what man? 

Context articles: Del Otro Lado del Sol
José Luis García Agraz
The Motorcycle Diaries (film)
On the Far Side of the Tunnel
Me Gusta Bailar Contigo
Al otro lado del río
Leo Sidran
Berta Serra Manzanares
Del Otro Lado del Puente
List of La otra cara del alma episodes

Del Otro Lado del Sol is the third studio album released in 1991 by Guatemalan singer-songwriter Ricardo Arjona.
José Luis García Agraz (born 16 November 1952) is a Mexican film director.
 He was born in Mexico City in 1952.
 He studied at the Centro de Estudios Cinematográficos (or CUEC) at UNAM.
 His script "Los supersabios" was turned into an animated feature in 1975.
 He was assistant director to José Estrada in "Maten al león" (1975) and "Los indolentes"; to Julián Pastor in "El esperado amor desesperado" (1975) and "La casta divina" (1976); to Gonzalo Martínez in "Del otro lado del puente" (1977), and to Arturo Ripstein in "La viuda negra" (1977) and "Cadena perpetua" (1978).
The Motorcycle Diaries (Spanish: "Diarios de motocicleta" ) is a 2004 biopic about the journey and written memoir of the 23-year-old Ernesto Guevara, who would several years later become internationally known as the iconic Marxist guerrilla commander and revolutionary Che Guevara.
 The film recounts the 1952 expedition, initially by motorcycle, across South America by Guevara and his friend Alberto Granado.
 As well as being a road movie, the film is a coming-of-age film; as the adventure, initially centered on youthful hedonism, unfolds, Guevara discovers himself transformed by his observations on the life of the impoverished indigenous peasantry.
 Through the characters they encounter on their continental trek, Guevara and Granado witness firsthand the injustices that the destitute face and are exposed to people and social classes they would have never encountered otherwise.
 To their surprise, the road presents to them both a genuine and captivating picture of Latin American identity.
 As a result, the trip also plants the initial seed of cognitive dissonance and radicalization within Guevara, who ostensibly would later view armed revolution as a way to challenge the continent's endemic economic inequalities and political repression.
On the Far Side of the Tunnel (Spanish: "Al otro lado del túnel" ) is a 1994 Spanish drama film directed by Jaime de Armiñán.
 It was entered into the 44th Berlin International Film Festival.
Me Gusta Bailar Contigo (English: "I Like To Dance With You") is the twelfth studio album released by Juan Gabriel in 1979 and was re-release in 1996 as Del Otro Lado del Puente.
 This album features songs from Del Otro Lado del Puente film.
"Al otro lado del río" (English: On the Other Side of the River ) is a song, written and performed by Uruguayan singer Jorge Drexler for the film "The Motorcycle Diaries" (2004).
 Besides the film's soundtrack, it can also be found in Drexler's seventh album "Eco"; in the soundtrack the bassist Jeff Eckels also performed.
Leo Sidran is a musician, composer, performer, and producer whose credits include co-producing the Oscar-winning song "Al Otro Lado Del Rio" for the soundtrack to the movie "The Motorcycle Diaries".
Berta Serra Manzanares (born 1958) is a Spanish poet and novelist.
 She was born in Rubí, Barcelona and studied Hispanic philology at the University of Barcelona.
 She published several volumes of poetry in the 1990s.
 Turning to fiction, she was nominated for the Premio Herralde for her debut novel "El otro lado del mundo".
 Her second novel was called "El oeste más lejano".
 Her most recent novel "Los ojos del huracán" is centred on the slave trade in colonial Cuba.
Del Otro Lado del Puente is the title of a soundtrack album released by Mexican singer-songwriter Juan Gabriel for the movie Del Otro Lado del Puente in 1979 and was re-release in 1996.
La Otra Cara del Alma (The Other Face of The Soul), previously known as Ángel Caído, La Otra Cara de Alma and El Otro Lado del alma, is a Mexican telenovela produced by Azteca.
 It stars Gabriela Spanic, Eduardo Capetillo, Michelle Vieth, Jorge Alberti, Amaranta Ruiz, Ramiro Huerta, Sergio Klainer, and Saby Kamalich.
 It is a remake of "El angel caido" which starred Rebecca Jones, produced by Televisa in 1985.