Author: Urs Format: MarkdownItexclarified in the first paragraph the presence and role of the ground field/ring
(prodded by the comment [here](https://nforum.ncatlab.org/discussion/18983/semifree-dga/?Focus=121125#Comment_121125))
<a href="https://ncatlab.org/nlab/revision/diff/semifree+dga/17">diff</a>, <a href="https://ncatlab.org/nlab/revision/semifree+dga/17">v17</a>, <a href="https://ncatlab.org/nlab/show/semifree+dga">current</a>
clarified in the first paragraph the presence and role of the ground field/ring