The warm-up statements are part of the main study and their hidden function is to familiarize respondents with the content and teach them how to provide answers, thus, such short training is necessary to obtain reliable results. It is recommended to use 6 such statements and they always appear as the first ones. What is more, you can select statements of your own choice. They should refer to the topic of your main study and be similar to the actual tested values in terms of structure.
After this short exercise, the respondent is well prepared and knows what to expect as warm-ups teach respondents how to press buttons properly, so important data is not lost later on. Having this goal in mind you can select any warm-up you want. No data is recorded for them.