</a><span class="lineno">   30</span>&#160;        </div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;        <span class="comment">//--------Private elements--------//</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;        <span class="keywordtype">void</span> insert_special_tokens() {</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;                word_to_ind_[BOS_TOK] = BOS_IND;</div>
<div cl