Add scibert example

docs/examples/scibert/views/__init__.py

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+from .evaluated_sentence import EvaluatedSentence
+from .match import Match

docs/examples/scibert/views/evaluated_sentence.py

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+from typing import List
+
+from pydantic import BaseModel
+
+from .match import Match
+
+
+class EvaluatedSentence(BaseModel):
+    score: float
+    text: str
+    explanation: List[Match]

docs/examples/scibert/views/match.py

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+from pydantic import BaseModel
+
+
+class Match(BaseModel):
+    phrase: str
+    score: float