ställdes
ställdes is the simple past tense in the passive voice of the Swedish verb ställa (to place, to set, to pose). It is used when describing an action that was carried out to or on the subject by someone else in the past. The form is common in formal writing, reporting, and narrative prose where the agent performing the action is unknown or not important.
In usage, stelle sentences with past passive show that something was placed, arranged, or posed. Examples include:
Grammatical notes: The present passive form of ställa is ställs (is placed), while the past passive form
Etymology and relatives: ställa belongs to the Germanic family of verbs related to the English set and