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:
John Karlen
Table title:
Films
Table:
<table id='hittask' contenteditable='False'>
<tr> <td colspan=1 rowspan=1 > Year </td><td colspan=1 rowspan=1 > Title </td><td colspan=1 rowspan=1 > Role </td><td colspan=1 rowspan=1 > Notes </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1970 </td><td class="highlighted"  colspan=1 rowspan=1 > House of Dark Shadows </td><td class="highlighted"  colspan=1 rowspan=1 > Willie Loomis </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > Daughters of Darkness </td><td colspan=1 rowspan=1 > Stefan </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1971 </td><td class="highlighted"  colspan=1 rowspan=1 > Night of Dark Shadows </td><td class="highlighted"  colspan=1 rowspan=1 > Alex Jenkins </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1976 </td><td colspan=1 rowspan=1 > A Small Town in Texas </td><td colspan=1 rowspan=1 > Deputy Lenny Lutz </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1978 </td><td colspan=1 rowspan=1 > Killer's Delight </td><td colspan=1 rowspan=1 > Danny </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > Pennies from Heaven </td><td colspan=1 rowspan=1 > The Detective </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Racing with the Moon </td><td colspan=1 rowspan=1 > Mr. Nash </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Impulse </td><td colspan=1 rowspan=1 > Bob Russell </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Gimme an 'F' </td><td colspan=1 rowspan=1 > Bucky Berkshire </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1986 </td><td colspan=1 rowspan=1 > Native Son </td><td colspan=1 rowspan=1 > Max </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > The Dark Wind </td><td colspan=1 rowspan=1 > Jake West </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1993 </td><td colspan=1 rowspan=1 > Surf Ninjas </td><td colspan=1 rowspan=1 > Mac </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 > The Job Interview </td><td colspan=1 rowspan=1 > The Applicant </td><td colspan=1 rowspan=1 > Short film </td></tr>
</table>
Question:
What were John Karlen's roles in 1970 and 1978?
Answer:
John Karlen acted in 1970 House of Dark Shadows as Willie Loomis, and in 1978 Killer's Delight as Danny.