Assertion: level heading | /r/HasProperty | followed by only one third-level
Facets:
Source sentences:
text: For example, avoid having a second-level heading followed by only one third-level and then by another second-level.
text: For example, avoid having a second-level heading followed by only one third-level and then by another second-level.
text: For example, avoid having a second-level heading followed by only one third-level and then by another second-level.