壁画下方是治理有方的人民在田间和谐劳作，中间是创造财富的商人，上方盘旋着展开双翼的守护神塞库达斯。

Above the happy scene of well-governed people working harmoniously in neat fields or engaged in wealth-creating commerce hovers the winged figure of Securitas.

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普雷迪普·库马尔·达斯是一位工程师。

Pradip Kumar Das is an engineer.

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阿斯彭达博士认为，在需要查询多方掌控的多个数据集的交集之时，使用反数据库非常有用。

Dr Esponda sees great potential for using negative databases when there is a need to look at the intersection of many sets of data owned by different parties.

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