def get_understanding(parameters):
    understanding = [
        dict(
            text="The benefit:",
            propositions=["always increases with the number of tokens extracted",
              "increases up to a certain number of tokens, then decreases beyond that point",
              "does not depend on the number of tokens extracted"],
            solution="increases up to a certain number of tokens, then decreases beyond that point",
            explication="The benefit increases with the number of tokens extracted up to 22 tokens, then decreases beyond that."
        ),
        dict(
            text="During a period, the extraction cost depends on:",
            propositions=["only the number of tokens extracted individually",
              "the total number of tokens extracted by the players in your group"],
            solution="the total number of tokens extracted by the players in your group",
            explication=f"The benefit depends on individual extraction, but the cost depends on the total extraction "
                        f"of the {parameters['PLAYERS_PER_GROUP']} players in the group."
        ),
        dict(
            text="The total cost of the tokens extracted during a period is 570 ECU. You extracted 5 tokens out of the 15 tokens extracted in total by the 5 players, your cost is:",
            propositions=["5 ECU", "570/15 = 38 ECU", "5 x (570/15) =  190 ECU"],
            solution="5 x (570/15) =  190 ECU",
            explication="If the total cost of the tokens is 570 ECUs for 15 tokens extracted, then the average cost of each "
            "token is 570/15 = 38 ECU. You extracted 5 tokens, so your cost is 5x38 = 190 ECU. Another equivalent "
            "way to calculate your cost is to determine your share of the total extraction, (5/15), and multiply it "
            "by the total cost, so (5/15) x 570 = 190 ECU."
        ),
        dict(
            text="The cost of the 1st token extracted:",
            propositions=["is the same for each period",
              "depends on the number of tokens extracted in the previous period"],
            solution="depends on the number of tokens extracted in the previous period",
            explication="The cost of the 1st token extracted in a period is equal to the cost of the last token from the previous "
            "period + 1 ECU, and the cost of the last token in the previous period depends on the number of tokens "
            "extracted in that period. Therefore, the cost of the 1st token extracted in the current period depends "
            "on the number of tokens extracted in the previous period: the more tokens were extracted in the previous "
            "period, the higher the cost of the 1st token extracted in the current period."
        )
    ]
    return understanding