Synchronous
Definition
Used when: there is some degree of temporal overlap between the events described by the arguments. All forms of overlap are included.
Examples
Example 1:
(1) A: Jessie left the package on the porch
(2) A: while checking out if Lora was home.
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(2) --Synchronous--> (1)
Simultaneously, Jessie left the package on the porch while checking out if Lora was home.
References
See "Temporal.Synchronous" in the Penn Discourse Tree Bank Annotation Manual.