Assertion: immune system's cell | /r/CapableOf | process target
Facets:
value: from the environment
type: TRANSITIVE-OBJECT
Source sentences:
text: It was discovered that, for most antibodies, their generation depended on co-operation between at least two types of cell: a cell that processed and presented targets (antigens) from the environment [ antigen-presenting cell (APC)] and a lymphocyte that recognized the target antigen on the APC.