Update app.py

app.py

@@ -49,9 +49,9 @@ def preprocess_query(query):
     doc = nlp(query)
     tokens = set()
     for token in doc:
-        tokens.add(token.text)
-        tokens.add(token.lemma_)
-        tokens.update(get_synonyms(token.text))
+        tokens.add(token.text.lower())
+        tokens.add(token.lemma_.lower())
+        tokens.update(get_synonyms(token.text.lower()))
     return tokens
 
 def search_captions(query, captions):