fix: Few syntax edits so example will parse

While trying to parse the full example using the [redland rapper](http://librdf.org/raptor/rapper.html) utility, I found a few syntax errors that I went ahead and fixed.

- replaced a few periods that should've been semi-colons in predicate lists
- added a missing period to the `dct:rights` string
- added long string literal (i.e., triple quotes) to `dct:rights` to handle multiline
- added the default namespace as `@prefix : <#> .`