Learn Turkish: Altında dipnot bulunan satırı okuyayım mı? - Shall I read the line under which there is a footnote?

In this lesson's main structure (like hakkında konuştuğumuz adam), the noun being modified is the object of the clause's action. But here, satır (the line) acts as the subject of the verb bulunmak (to be found / to exist) — 'a footnote is found under the line'. When the modified noun is the subject, Turkish uses the -An participle instead of -dIk.

How does altında link to 'the line'?

Altında literally means 'at its bottom' or 'under it'. The hidden 'it' (the third-person possessive suffix -ı) refers forward to satır (the line). While English uses a relative pronoun like 'under which', Turkish uses a spatial word with a possessive suffix to say 'under it [there is a footnote] ... the line'.

Why is the verb bulunmak used here instead of var?

Var (there is) cannot take participle suffixes like -An or -dIk because it isn't a true verb. To say 'which has' or 'where there is' inside a relative clause, Turkish often uses the passive verb bulunmak (to be found / to be located) as a verb substitute for var.

Let's review okuyayım: why are there two y letters in it?