Assertion: hammer | /r/CapableOf | retain her wbo
Facets:
value: on 4 november
type: TEMPORAL
value: on 6 december
type: TEMPORAL
Source sentences:
text: " On 6 December 2013, Hammer retained her WBO and WBF female middleweight titles with a first-round knockout over Carmen Garcia Toscano at the Brandenburg Halle in Frankfurt.
text: On 4 November 2017, Hammer retained her WBO and WBC middleweight titles with a fourth-round knockout win over Gifty Amanua Ankrah at the SportScheck Allwetteranlage in Munich.