I have two questions regarding relative clauses (which I believe they are).
From an article in The Guardian
The Chinese government has taken the rare step of formally confirming to the UN the death of a Uighur man whose family believe had been held in a Xinjiang internment camp since 2017.
Here it says
" ... a Uighur man whose family believe had been held in..."
and here is what I'd rewrite as I understand the sentence:
"... Uighur man whose family believe (that) he had been held in..."
If I understood correctly, why is the subject 'he' omitted?
If not, what is grammatical rule behind the original sentence from the Guardian?
From an article in the Wall Street Journal
The Biden administration on Thursday barred U.S. companies from supplying Chinese entities it said were building supercomputers to help Beijing develop new weapons of mass destruction, including nuclear devices.
Here it says
"...Chinese entities it said were building supercomputers..."
and here is how I understand the sentence:
"... Chinese entities which the Biden administration said were building supercomputers..."
‘which’ here is 'entities' is how I understand it.
Is this correct? If it is, what is ‘it said’? Is it just an embedded clause?
What grammar is behind this one?