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middle age man with grey hair university teacher tired using computer at university classroom
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middle
age
grey
hair
man
male
adult
mature
senior
glasses
hispanic
brazilian
student
education
college
study
smart
academic
learn
learning
studying
sitting
table
desk
book
books
serious
relaxed
concentrate
computer
pc
internet
online
technology
university
working
work
professional
tired
upset
worried
room
classroom
school
indoor
interior
indoors
library