1. A method comprising: aggregating, from a set of points extracted from a large document, a set of core points, a point and a core point each being a topic covered in the document; constructing, for the core point in the set of core points, a network of associations, wherein an association in the network comprises an entity that has a relationship with the core point by virtue of having contributed data in the document that relates to the core point; computing, from the contributed data a sentiment value of the contributed data, the sentiment value being indicative of a sentiment of the entity towards the core point; computing from a set of sentiment values corresponding to the associations in the network of associations, an overall sentiment value for the core point; and reporting overall sentiment values for each core point in the document.