Assume that your file is .json extension but every line is a JSON string, then line 2 in your JSON file 'orig.json' is malformed, it's not in correct JSON syntax, eg. JSON needs doublequotes around keys (properties) and values, not singlequotes.
But normally, when your files come with .json extension, you don't read line by line that way, parse the whole file instead:
annotations = []
with open('/content/orig.json') as f:
text = f.read()
annotations.append(json.loads(text))
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