Entity mining is one of the hot topics in the area of web mining and information retrieval. In this talk, I will discuss in brief three interesting entity linking problems which apply various machine learning techniques: Entity linking, Dominant Entity Identification, and Cricket Linking. Entity linking is the problem of linking a mention phrase from a document to an entity in the knowledge base. Dominant entity identification is the problem of finding whether an entity e is the dominant entity for a page p. Cricket linking is the problem of linking event mentions from cricket match reports to a set of balls in cricket commentaries. In my talk, I will discuss these problems in detail, and will present interesting solutions to them.