There is a reason to believe that they have saved the children. Change into Passive voice.

There is a reason to belive that the children have been saved by them.
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There is a reason to believe that the children have been saved by them.
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It is to be believed that they have saved the children.
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It is reasonable to believe that children have been saved by them.
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It is a reason to believe that the children have been saved by them
  • -1
Is there a reason to believe that they have saved the child.
  • 1
It is believed that the crew has been saved by them.
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