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:
Michael Clark (dancer)
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 > Director </th><th colspan=1 rowspan=1 > Role/Credit </th></tr>
<tr> <td colspan=1 rowspan=1 > 1986 </td><td class="highlighted"  colspan=1 rowspan=1 > Hail the New Puritan </td><td class="highlighted"  colspan=1 rowspan=1 > Charles Atlas </td><td class="highlighted"  colspan=1 rowspan=1 > Himself/Choreographer </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1989 </td><td class="highlighted"  colspan=1 rowspan=1 > Because We Must </td><td class="highlighted"  colspan=1 rowspan=1 > Charles Atlas </td><td class="highlighted"  colspan=1 rowspan=1 > Himself/Choreographer </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > Prospero's Books </td><td colspan=1 rowspan=1 > Peter Greenaway </td><td colspan=1 rowspan=1 > Caliban/Choreographer </td></tr>
<tr> <td colspan=1 rowspan=1 > 2001 </td><td colspan=1 rowspan=1 > The Late Michael Clark </td><td colspan=1 rowspan=1 > Sophie Fiennes </td><td colspan=1 rowspan=1 > Himself/Choreographer </td></tr>
</table>
Question:
What films did Michael Clark work in 1989 featuring Charles Atlas?
Answer:
Michael Clark worked on Hail the New Puritan and Because We Must (1989), both with Charles Atlas.