Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Richard Basehart
Table title:
Accolades
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Award </th><th colspan=1 rowspan=1 > Category </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Result </th><th colspan=1 rowspan=1 > Ref </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1951 </td><td class="highlighted"  colspan=1 rowspan=2 > National Board of Review Awards </td><td colspan=1 rowspan=1 > Best Actor </td><td class="highlighted"  colspan=1 rowspan=1 > Fourteen Hours </td><td class="highlighted"  colspan=1 rowspan=2 > Won </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1956 </td><td colspan=1 rowspan=1 > Best Supporting Actor </td><td class="highlighted"  colspan=1 rowspan=1 > Moby Dick </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > BAFTA Awards </td><td colspan=1 rowspan=1 > Best Foreign Actor </td><td colspan=1 rowspan=1 > Time Limit </td><td colspan=1 rowspan=1 > Nominated </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1960 </td><td colspan=1 rowspan=1 > Hollywood Walk of Fame </td><td colspan=1 rowspan=1 > Motion Pictures </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Inducted </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What performance did Basehart receive the National Board of Review Awards for ?
Answer:
Basehart receivied the National Board of Review Awards for his performances in Fourteen Hours (1951) and Moby Dick (1956).