6. A method for generating opinion pairs having sentiment orientation based impact relations, comprising: receiving, by a computer, a plurality of object-oriented opinions; extracting, by said computer, impact-related object-oriented opinions from said plurality of object-oriented opinions, said impact-related object-oriented opinions comprising any object-oriented opinions in said plurality of object-oriented opinions and having impact relations with any other object-related opinions in said plurality of object-oriented opinions; analyzing, by said computer, said impact-related object-oriented opinions to determine sentiment orientations between pairs of said impact-related object-oriented opinions, each sentiment orientation indicating whether a first object-oriented opinion has one of a positive impact and a negative impact on a second object-oriented opinion; calculating, by said computer, confidence scores for said impact relations between said impact-related object-oriented opinions; and establishing, by said computer, an impact relation database and storing, in said database, each pair of said impact-related object-oriented opinions with an associated sentiment orientation and an associated confidence score, said calculating of said confidence scores comprising calculating said associated confidence score for each specific pair of said impact-related object-oriented opinions comprising a specific first object-oriented opinion that impacts a specific second object-oriented opinion by determining a number of other pairs of said impact-related object-oriented opinions that comprise other first object-oriented opinions that impact said specific second object-oriented opinion and dividing 1 by said number.
9. The method according to claim 6 , for each of said pairs of said impact-related object-oriented opinions, said associated confidence score indicates a degree of influence said first object-oriented opinion has on said second object-oriented opinion.