ILC 1 expanded class y8

      y8    about subject

y8  [V]	about, on, dealing with, studying subject
y800  [an]	cultural diversity
y86  [V]	within context
y8mp4a  ⋄	oral about plants  [ethnobotany]
ym	mathematics, maths  « y8a
yma	mathematical logic, foundations  « y8a
ysd	physics  « y8d
ysf	chemistry  « y8f
ysh	geology, petrography  « y8jc
ysi	astronomy  « y8h
ysj	meteorology  « y8i
ysl	biology  « y8kVo
yslg	genetics  « y8k
yslv	evolutionary biology  « y8n(31)
ysly	ethology  « y8o
yslys	bioacoustics  « y8g(3s) y8o y8q
ysq	linguistics  « y8r
ysr	sociology  « y8s
ysu	economics  « y8u
ysv	political sciences, politology  « y8t
yth	psychology  « y8p

or

Facets key
0  under aspect      
1  at time           
2  in place          
3  through process   
4  made of element   
5  with organ        
6  from origin       
7  to destination    
8  like pattern      
9  of kind