american
asleep
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child
children
class
classmate
classroom
closed
cognition
desk
educating
elementary
european
eye
fatigue
female
girl
indoors
kid
knowledge
learn
learning
lesson
lifestyle
nap
notebook
person
primary
pupil
school
schoolchild
schoolgirl
schooling
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sitting
sleep
sleepy
stress
student
study
studying
table
tedious
tired
upset
weary
young