What I stated was that big players have (not since HL TO - didn't say that) looked closely at SDL before. Here is just one article. Look at the announcements over time.
http://www.theaustralian.com.au/business/mining-energy/sundance-shares-rise-as-posco-vies-to-be-iron-ore-partner/story-e6frg9df-1225997692516