DB<132> $_ = 'phrase. "phrase1.phrase2" phrase. phrase'
0  'phrase. "phrase1.phrase2" phrase. phrase'

  DB<133> split /(".*?"|\.)/
0  'phrase'
1  '.'
2  ' '
3  '"phrase1.phrase2"'
4  ' phrase'
5  '.'
6  ' phrase'

  DB<134>