## 3 Collecting Data from the Basque Parliament  
The Basque Parliament's activities consist of plenary sessions, to which all Members of Parliament (MPs) are summoned, and committee meetings, usually comprising around 15 MPs. The minutes of both plenary sessions and committee meetings are publicly available. Additionally, subtitled videos of plenary sessions are released through the Basque Parliament website ([[https://www.legebiltzarra.eus/portal/es/web/eusko-legebiltzarra/](https://www.legebiltzarra.eus/portal/es/web/eusko-legebiltzarra/)]([https://www.legebiltzarra.eus/portal/es/web/eusko-legebiltzarra/](https://www.legebiltzarra.eus/portal/es/web/eusko-legebiltzarra/)), accessed on 24 February 2024). Only plenary sessions were considered to build the datasets described in this paper. The audio recordings were extracted from the videos while the transcriptions were extracted from the draft minutes handed to us by the Basque Parliament. The draft minutes are acoustically close to what speakers say in their turns, similar to the verbatim reports of United Kingdom parliamentary debates (_Hansards_) ([[https://hansard.parliament.uk/](https://hansard.parliament.uk/)]([https://hansard.parliament.uk/](https://hansard.parliament.uk/)), accessed on 24 February 2024) [33]. The draft minutes are not publicly available and were handed to us only to produce the video subtitles. We chose the draft minutes over the official minutes because we wanted segment transcriptions to be as close as possible to the uttered speech. The official minutes are obtained from the draft minutes after a laborious manual process that involves fixing lexical and grammar issues, removing all kinds of spontaneous speech events and adding translations to the other language (from Basque to Spanish and vice versa). In this way, the official minutes will be grammatically correct and will convey the intended meaning but may differ considerably from the words actually spoken. Plenary sessions of the Basque Parliament are held almost every week of the year, amounting to around 40 plenary sessions per year. Each session takes between 3 and 7 h, sometimes with a break for lunch. Each plenary session has an agenda with a series of topics to be discussed. Topics include legislative initiatives proposed by the government or by a parliamentary group and specific measures adopted by the government that must be approved by the parliament. This means that topics change from session to session involving new technical terms, new names of places and persons, etc. Speakers participating in plenary sessions include not only MPs but also counselors and officers of the \begin{table}
\begin{tabular}{c c c c} \hline
**IPA** & **ASCII** & \multicolumn{3}{c}{**Examples**} \\  & & **Spanish** & **Basque** \\ \hline  & & & casa & \\ k & k & queso & ekarri \\  & & & kilo & \\ g & g & gata & gia \\ f & f & fatal & afaria \\  & & & cero & \\ \(\theta\) & z & pazo & – \\ s & s & sala & hasi \\ s\({}^{\prime}\) & s & – & zoroa \\ f & s & – & kaivo \\ x & j & mujer & ijito \\  & & rosa & \\ r & R & torre & arrnta \\ r & r & puro & diura \\ l & l & lejos & lana \\ f & X & mucho & tkikia \\ ts\({}^{\prime}\) & X & – & atzo \\ ts & X & – & mahtsa \\ c & X & – & ttakun \\ \(\delta\) & y & caballo & pilaka \\  & & hielo & \\ j & y & cornoye & – \\ j & y & – & joan \\ j & y & – & onddo \\ \hline \end{tabular}
\end{table} 
Table 1: _Cont._Basque Government and representatives of organizations (unions, chambers of commerce, associations, etc.). Also, during each 4-year parliamentary period (called _legislature_), some MPs may be replaced by others (e.g., so far in the current legislature, there have been 19 MPs replaced). This explains why we could end up with 100 speakers participating in plenary sessions each year. During a plenary session, each speaker may take the floor several times (generally from the speaker's stand, sometimes from the Parliament seats). Turns are managed by the president of the Parliament, so speakers do not overlap very often.