The administration of US President Joe Biden submitted its response on Wednesday to Iran regarding the European Union proposal to revive the 2015 nuclear deal. Here is what we know about the response and status of the talks so far. US State Department spokesman Ned Price confirmed that the response has been sent following eight days of internal and external consultations. “Our review of those comments has now concluded. We have responded to the EU today,” Mr Price said. Iran has confirmed the receipt of the US response. “This evening, Iran received the US response through the European Union. The careful review of the response has started in Tehran,” Iranian Foreign Ministry spokesman Nasser Kanaani said. But the White House acknowledged that gaps remain. In a gaggle with reporters, National Security Council spokesman John Kirby said more work is required. “We are closer now than we were even just a couple of weeks ago because Iran made the decision to make some concessions … [but] long gaps remain. We're not there yet.” Mr Kirby was referring to two concessions from Iran: the first entails Tehran dropping its demand to delist the Islamic Revolutionary Guard Corps as a terrorist organisation, while the second involves Iran forgoing its demand that the International Atomic Energy Agency close an investigation into traces of uranium found at three undeclared sites, the Associated Press reported.