1 Subjects: “...Feature extraction...”

2 Subjects: “...color-texture feature extraction...”

3 Subjects: “...information extraction...”

4 Subjects: “...information extraction...”

5 Subjects: “...relationship extraction...”

6 Subjects: “...conceptual information extraction...”

7 Subjects: “...automatic relation extraction...”

8 Subjects: “...partial model extraction...”

9 Subjects: “...data extraction...”

10 Subjects: “...bitumen extraction...”

11 Subjects: “...Extracting and representing meaning...”

12 Subjects: “...feature extraction...”

13 Subjects: “...natural extracts...”

14 Subjects: “...relation extraction...”

15 Subjects: “...keyphrase extraction...”

16 Subjects: “...structure extraction...”

17 Subjects: “...keyword extraction...”

18 Subjects: “... Umanitaria,Medieval Islamic geography,Ramusio,Extractive institutions,Yerevan,Cagi Acmet,Islam in Tang China...”