The function f(x) seems to be selecting for concepts related to time and location. It assigns higher values (closer to 1) to words that are associated with time-related concepts such as "seconds" and "minutes". Additionally, the function assigns higher values to words that are related to specific locations such as "Berlin Wall" and "Alps". However, it also selects for other concepts as indicated by the lower values assigned to words like "school" and "RAM".

Please let me know if you would like to test any other words or if there is anything else I can assist you with.