Spanish to English Other International Org/Dev/Coop

Hi, this is the beginning of a paragraph describing how a form was used to classify various different activities carried out by organizations for the purposes of exchanging practices and sharing information. I'm unsure as to whether there is an error and 'definen' should in fact be 'define' - ie the 'pregunta central' defines the characteristics of the practices, or whether these characteristics can indeed be the subject of the verb - the characteristics somehow define or address the central question? The central question is defined by...?

"Sin embargo, la ficha propone una “pregunta central” que definen las características de las prácticas que deben presentar los receptores principales."

My first instinct was that it was a typo, but I would appreciate all thoughts to rule out other possiblities. Many thanks.

for more context, the text continues as follows:

"Específicamente se plantea el rol que han jugado o juegan las organizaciones que asumen la función de receptores principales para: a) “apoyar el fortalecimiento de los sistemas comunitarios y de salud [...] etc"

Latin American Spanish, probably Mexican.