“she married wildlife cinematographer Hugo van Lawick, which National Geographic had hired to film her in the early 1960s.”
" a fascinating person I’ve admired since I was a child. It was a thrill to see old Flo and her child Flint, which I’d read about in her 1967 book, My Friends the Wild Chimpanzees."
Whatever happened to “who” and “whom”? Everything these days is “which”.