Federal authorities are investigating large markings discovered in the grass on the National Mall that appear to spell out “86 47,” and the discovery quickly triggered a federal response that included evidence collection, testing and a review by multiple agencies. The markings were found Thursday near the World War II Memorial. Investigators have not determined how they were created, who made them or what message was intended. Download the SAN app today to stay up-to-date with Unbiased. Straight Facts™. Point phone camera here Investigators collect evidence Photographs taken from the Washington Monument by a Reuters photographer show what appears to be the sequence “8647” etched into the lawn. The eight is the easiest to identify, while the four and the seven are far less distinct, making the full message difficult to recognize from ground level. U.S. Park Police responded shortly before noon after receiving a vandalism report. Officers and investigators secured part of the area, collected grass samples and began examining what caused the discoloration. National Guard personnel were also seen at the site as authorities worked around several brown patches in the grass. The Interior Department characterized the incident as vandalism and said it would be investigated aggressively. “Any threat against the president is taken very seriously by the Department, and our U.S. Park Police will investigate this incident and hold those responsible accountable,” an Interior Department spokesperson said. Why the numbers matter The phrase “86 47” has become a flashpoint in political and legal disputes surrounding President Donald Trump. The number 47 refers to Trump as the nation’s 47th president. The meaning of “86” is more contested. Merriam-Webster traces the term to restaurant and service-industry slang commonly used to mean remove, reject or get rid of something. Trump allies and federal prosecutors have argued that, when paired with