Assertion: bacteria | /r/HasAspect | two main groups
Facets:
value: traditionally
type: OTHER
Source sentences:
text: Although bacteria are traditionally divided into two main groups, gram-positive and gram-negative, based on their Gram stain retention property, this classification system is ambiguous as it refers to three distinct aspects (staining result, envelope organization, taxonomic group), which do not necessarily coalesce for some bacterial species.