Who is Ivan Cepeda, left-wing candidate in Colombia's presidential elections?

Colombians are heading to the polls this Sunday for the second round of the presidential election. Up against the far-right Abelardo de la Espriella, the left-wing candidate Ivan Cepeda is the political heir to outgoing president Gustavo Petro. Report by Rodrigo Sedano and Aitor Chavarri, narrated by Juliette Brown.