noun
a unit of instruction or teaching
verb
None
adjective
None
adverb
None
pronoun
None
preposition
None
conjunction
None
interjection
None
article
None
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The professor delivered an insightful lesson on quantum mechanics.
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I learned a valuable lesson about time management from missing my deadline.
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Dude, that breakup was a harsh lesson in love.
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Life has a way of teaching us lessons when we least expect it.