the pantograph is not a Umbelliferae.
sent1: if either the artist is arterial or it is a kind of a Umbelliferae or both the pantograph is not an orange. sent2: the fact that the artist is arterial is correct. sent3: if the artist is an acoustics it is an orange and it is not arterial. sent4: the fact that the pantograph is not a Umbelliferae is correct if the artist is a kind of an orange and/or it is arterial.
sent2 -> int1: the artist is an orange or arterial or both.; sent4 & int1 -> hypothesis;
the pantograph is a Umbelliferae.
$hypothesis$ = the pantograph is not a Umbelliferae. ; $context$ = sent1: if either the artist is arterial or it is a kind of a Umbelliferae or both the pantograph is not an orange. sent2: the fact that the artist is arterial is correct. sent3: if the artist is an acoustics it is an orange and it is not arterial. sent4: the fact that the pantograph is not a Umbelliferae is correct if the artist is a kind of an orange and/or it is arterial. ; $proof$ = 
sent2 -> int1: the artist is an orange or arterial or both.; sent4 & int1 -> hypothesis; __PROVED__