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:
Holman ministry (1916–20)
Table title:
Third arrangement
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Portfolio </th><th colspan=1 rowspan=1 > Minister </th><th colspan=2 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Term commence </th><th colspan=1 rowspan=1 > Term end </th><th colspan=1 rowspan=1 > Term of office </th></tr>
<tr> <td colspan=1 rowspan=1 > Attorney-General </td><td colspan=1 rowspan=1 > Hon. John Garland, KC, MLC </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=11 > Nationalist </td><td class="highlighted"  colspan=1 rowspan=2 > 23 July 1919 </td><td colspan=1 rowspan=5 > 12 April 1920 </td><td colspan=1 rowspan=2 > 264 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Minister for Justice Solicitor-General </td><td colspan=1 rowspan=1 > Hon. John FitzGerald, MLC </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Minister for Agriculture </td><td colspan=1 rowspan=1 > Hon. William Ashford, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 9 February 1920 </td><td colspan=1 rowspan=1 > 63 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Minister for Labour and Industry </td><td colspan=1 rowspan=1 > Hon. Augustus James, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 23 July 1919 </td><td colspan=1 rowspan=1 > 264 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Minister of Public Health </td><td colspan=1 rowspan=1 > Hon. Albert Bruntnell, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 9 February 1920 </td><td colspan=1 rowspan=1 > 63 days </td></tr>
<tr> <td colspan=1 rowspan=2 > Vice President of the Executive Council </td><td colspan=1 rowspan=1 > Hon. David Hall, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 30 July 1919 </td><td colspan=1 rowspan=1 > 9 February 1920 </td><td colspan=1 rowspan=1 > 194 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Hon. Sir George Fuller, KCMG, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 9 February 1920 </td><td colspan=1 rowspan=1 > 27 February 1920 </td><td colspan=1 rowspan=1 > 18 days </td></tr>
<tr> <td colspan=1 rowspan=2 > Minister for Housing </td><td colspan=1 rowspan=1 > Hon. David Hall, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 23 July 1919 </td><td colspan=1 rowspan=1 > 9 February 1920 </td><td colspan=1 rowspan=1 > 201 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Hon. Charles Oakes, CMG, MLA </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=3 > 9 February 1920 </td><td class="highlighted"  colspan=1 rowspan=3 > 12 April 1920 </td><td colspan=1 rowspan=3 > 63 days </td></tr>
<tr> <td colspan=1 rowspan=2 > Minister without portfolio </td><td colspan=1 rowspan=1 > Hon. John Crane, MLA </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Hon. Arthur Grimm, MLA </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What was Holman's party in July 1919 and how long were they in power?
Answer:
Holman's Nationalist party's term covered the period from 23 July 1919 until 12 April 1920.