string indices must be integers

[constantin01]

So, I have:

data = json.loads(requests.get(url).text)
print(type(data))
print(data[0])

<class 'list'>
{'sentence': ['what', 'is', 'a', 'transistor'],
 'tags': ['WH', 'AUX', 'DT', 'NN']}

then I want to separate 'sentence' and 'tags'

sents = []
tags = []

for element in data:
  sents.append(element['sentence'])
  tags.append(element['tags'])

and here a problem:

TypeError                                 Traceback (most recent call last)
<ipython-input-8-68927e1d38ae> in <module>()
      3 
      4 for element in data:
----> 5   sents.append(element['sentence'])
      6   tags.append(element['tags'])

TypeError: string indices must be integers

what is wrong?

P.S. if I just print it - it is printed without problems.