テンプレートエラー
object(WP_Post)#1607 (24) {
  ["ID"]=>
  int(175)
  ["post_author"]=>
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  ["post_date"]=>
  string(19) "2019-08-07 12:53:20"
  ["post_date_gmt"]=>
  string(19) "2019-08-07 03:53:20"
  ["post_content"]=>
  string(0) ""
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  string(8) "cover_02"
  ["post_excerpt"]=>
  string(0) ""
  ["post_status"]=>
  string(7) "inherit"
  ["comment_status"]=>
  string(4) "open"
  ["ping_status"]=>
  string(6) "closed"
  ["post_password"]=>
  string(0) ""
  ["post_name"]=>
  string(8) "cover_02"
  ["to_ping"]=>
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  ["post_modified"]=>
  string(19) "2019-08-07 12:53:20"
  ["post_modified_gmt"]=>
  string(19) "2019-08-07 03:53:20"
  ["post_content_filtered"]=>
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  ["post_parent"]=>
  int(174)
  ["guid"]=>
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  ["menu_order"]=>
  int(0)
  ["post_type"]=>
  string(10) "attachment"
  ["post_mime_type"]=>
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  ["comment_count"]=>
  string(1) "0"
  ["filter"]=>
  string(3) "raw"
}