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crowdsourcing
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internet properties established in 2011
social networking language education websites
apps
duolingo
business
chat
chatterbots
education
insider
instant messaging
interactive fiction
language learning
mobile
natural language parsing
smartphone
tc
What
duolingo
language
5
×
new
5
×
today
5
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app
learning
chatbots
company
help
ios
learn
anybody
duolingo’s
languages
popular
tutors
using
accessible
ahn
aims
apparent
aren’t
bad
called
card
class
comes
context
convenient
conversation
creator
crew
demand
dime
duolingo's
environment
eternally
expands
expensive
experience
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