> かわいそう **に** 思いました

Is this an exception or an expression. This basically
means「かわいそうだと思いました」right? Normally with に it would be an adverb, but in this
situation it's what he thinks. Can someone explain how that form works?
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2021-09-05T12:42:03.260
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2021-09-05T19:43:45.507
2021-09-05T19:05:48.397
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question
particle-に
How does かわいそうに work?