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  1. x <- 'The world is at end. What do you think? I am going crazy! These people are too calm.'
  2. strsplit(x, '(?<![^!?.])\\s+', perl=T)
Success #stdin #stdout 0.3s 22832KB
stdin
Standard input is empty
stdout
[[1]]
[1] "The world is at end."       "What do you think?"        
[3] "I am going crazy!"          "These people are too calm."