υμεις personal pronoun - second person nominative plural
humeis  hoo-mice': you (as subjective of verb) -- ye (yourselves), you.
δε conjunction
de  deh: but, and, etc. -- also, and, but, moreover, now (often unexpressed in English).
εστε verb - present indicative - second person
este  es-teh': ye are -- be, have been, belong.
μαρτυρες noun - nominative plural masculine
martus  mar'-toos: a witness; by analogy, a martyr -- martyr, record, witness.
τουτων demonstrative pronoun - genitive plural neuter
touton  too'-tone: of (from or concerning) these (persons or things) -- such, their, these (things), they, this sort, those.