7. The system as claimed in claim 6 , wherein a feature represents a specific word, said learning further comprising: extracting feature vectors in the target domain using identical vocabulary and word statistics used for extracting features in said source domain.
7. The system as claimed in claim 6 , wherein a feature represents a specific word, said learning further comprising: extracting feature vectors in the target domain using identical vocabulary and word statistics used for extracting features in said source domain. 8. The system as claimed in claim 7 , wherein said extracting includes extracting word features from source domain examples and said abbreviated target domain examples.