I never expected actual SF discussion in this precise thread but like it shows that link the hypotesis are quite a number, I always say to those science fetishists that not even maths is a unique language even on Earth, from the way of writing (we just use a relatively new convention) to the way of conceiving math as a discipline. Just by reading what's left of Greek mathematician works they even considered that there were some notions (different to axioms) that you need to agree with if you want to accept that mathematics logic, and Euclid is just an example. So if we needed not only years but also someone explaining and lots of practicing to understand one or another, assuming that some lifeforms are going to understand "if they're intelligent enough" some coordenates transmitted without context nor understanding is both naïve and presumptuous (like they wouldn't considered the change of being some radiation noise in case they managed to pick up).
I could go and comment all those options, but unlike the most famous TV series, films and books usually fantasise about (a huge amount in fact) "look at how interesting we are the rest of the Universe needs to be concerned about us" or "look at us, we're the chosen ones". As long as it's fiction, bring on all those interesting stories, be Asimov works, all those cited in Wikipedia or more popular and accessible options for the average aficionado like Star Trek. One reason why I like that much Legend of the Galactic Heroes is the fact that, even if our own species advances to such technological level and have good intentions on the clue moment, all can vanish away with just a political rift, a new form of colonialism, a chain of wars, etc. and stop caring about whether there's someone else out there because they're much worried about surviving themselves. Of course, it could be as easy as thinking they share the same quirks and are prone to the same mistakes, they may have become grandeous just before extinguishing themselves without no one else noticing or be happening all of this now and go unnoticed before we extinct ourselves. Like a teacher of mine said, "life is hard and dry like the bottom of a cucumber".