10. A device for generating and retrieving opinion pairs having sentiment orientation based impact relations, comprising: a central processing unit (CPU) receiving a plurality of object-oriented opinions, said CPU extracting 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-oriented opinions in said plurality of object-oriented opinions, said CPU analyzing 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, said CPU calculating confidence scores for said impact relations between said impact-related object-oriented opinions, said CPU establishing an impact relation database and storing, in said database in a memory unit, each pair of said impact-related object-oriented opinions with an associated sentiment orientation and an associated confidence score, said CPU retrieving, from said impact relations database in response to a query, any of said pairs of said impact-related object-oriented opinions associated with an object of said query, said CPU calculating said associated confidence score for a specific pair of said impact-related object-oriented opinions, said specific pair 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.
10. A device for generating and retrieving opinion pairs having sentiment orientation based impact relations, comprising: a central processing unit (CPU) receiving a plurality of object-oriented opinions, said CPU extracting 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-oriented opinions in said plurality of object-oriented opinions, said CPU analyzing 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, said CPU calculating confidence scores for said impact relations between said impact-related object-oriented opinions, said CPU establishing an impact relation database and storing, in said database in a memory unit, each pair of said impact-related object-oriented opinions with an associated sentiment orientation and an associated confidence score, said CPU retrieving, from said impact relations database in response to a query, any of said pairs of said impact-related object-oriented opinions associated with an object of said query, said CPU calculating said associated confidence score for a specific pair of said impact-related object-oriented opinions, said specific pair 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. 13. The device according to claim 10 , for each of said pairs of said impact-related object-oriented, said associated confidence score indicates a degree of influence said first object-oriented opinion has on said second object-oriented opinion.