Motivation

• Chapter6$B$^$G$O(B...
  • Heuristic $B$K$h$k2r7h(B
  • $BZ$,:$Fq(B
• Chapter7$B$G$O(B..
  • $BE}7W$r;H$C$?2r@O(B
  • $B5pBg%3!<%Q%9$,MxMQ$G$-$k$h$&$K$J$C$?(B
    (Brown Courps, AP news, Wall Street Journal, Penn Treebank)