"in tandem" meaning in English

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          "text": "The seats were in tandem.",
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        "One behind the other."
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          "text": "He runs the shop in tandem with his brother.",
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          "ref": "2010, Mark Bonta, “Ethno-ornithology and Biological Conservation”, in Sonia Tidemann, Andrew Gosler, editors, Ethno-ornithology: Birds, Indigenous Peoples, Culture and Society, London: Earthscan, →ISBN, pages 21–22:",
          "text": "In countries such as the US, bird-feeding, birdwatching, and other types of ornithophilic behaviour form the basis of huge conservation efforts, in tandem with science.",
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          "text": "Investors were now warier of Underground railways. They had seen that the Metropolitan was bringing in lower returns, having broached its City extensions. But the newly established Metropolitan Board of Works (the first London-wide authority) pressed the District to continue with the next part of the plan - Westminster to Blackfriars - so that the building of the railway could go in tandem with the construction of the new Thames Embankment and the sewer it incorporated.",
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  "word": "in tandem"
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          "text": "In countries such as the US, bird-feeding, birdwatching, and other types of ornithophilic behaviour form the basis of huge conservation efforts, in tandem with science.",
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          "ref": "2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 61:",
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