@relation student_score
@attribute math numeric 
@attribute physics numeric 
@attribute english numeric 
@attribute chinese numeric 
@data 
90,100,40,50
80,90,30,45 
85,95,50,40
30,50,100,90
50,40,90,95
35,45,95,100
100,90,95,100
87,95,95,90
10,40,30,50
50,30,20,60