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:
Sean Garrison
Table title:
Filmography
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > Darby's Rangers </td><td colspan=1 rowspan=1 > Young Soldier </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > Violent Road </td><td colspan=1 rowspan=1 > Ken Farley </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > Onionhead </td><td colspan=1 rowspan=1 > Yeoman Kaffhamp </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > Up Periscope </td><td colspan=1 rowspan=1 > Seaman Floyd </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1961 </td><td class="highlighted"  colspan=1 rowspan=1 > Splendor in the Grass </td><td class="highlighted"  colspan=1 rowspan=1 > Glenn </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1961 </td><td class="highlighted"  colspan=1 rowspan=1 > Bridge to the Sun </td><td class="highlighted"  colspan=1 rowspan=1 > Fred Tyson </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1966 </td><td colspan=1 rowspan=1 > Moment to Moment </td><td colspan=1 rowspan=1 > Mark Dominic </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1967 </td><td colspan=1 rowspan=1 > Banning </td><td colspan=1 rowspan=1 > Richard Tyson </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1976 </td><td colspan=1 rowspan=1 > Midway </td><td colspan=1 rowspan=1 > Lt. Cmdr. Ken Cunningham </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
</table>
Question:
What film roles did Sean Garrison have in 1961?
Answer:
Sean Garrison had two film roles in 1961, as Glenn in Splendor in the Grass and as Fred Tyson in Bridge to the Sun.