Assertion: nucleolus | /r/AtLocation | 1830
Facets:
Source sentences:
text: The nucleolus is a nuclear structure that was first described in the 1830s.
text: The nucleolus is a nuclear structure that was first described in the 1830s.
text: The nucleolus is a structure found in the cell nucleus, which was first described in the 1830s.
text: The nucleolus is a structure found in the cell nucleus, which was first described in the 1830s.