Learn Turkish: İçinde fotoğraflar gördüğümüz biyografiyi hangi matbaacı basacak? - Which printer will print the biography in which we saw the photos?

To form a prepositional relative clause like 'in which', Turkish uses a postposition with a possessive suffix, followed by the -dIk relative clause. Here, içinde literally means 'inside of it', where 'it' refers to the biography. Combined with gördüğümüz (our seeing), the literal translation is 'its-inside photos our-seeing biography'.

Why is biyografi in the accusative case (biyografiyi)?

Biyografiyi is the direct object of the main verb basacak (will print). Because the relative clause makes it a specific, defined object ('the biography in which...'), it must take the definite accusative suffix -(y)i.

Why is the subject hangi matbaacı placed right before the verb instead of at the beginning of the sentence?

In Turkish, the most emphasized information is placed immediately before the verb. Here, the sentence is asking exactly who will do the printing, so the question phrase hangi matbaacı (which printer) naturally takes the pre-verbal focus position.

Does matbaacı refer to the printing machine or a person?