Below are a collection of excerpts from biomedical research articles. Excerpts are separated by newlines. Your task is to answer a question based these excerpts. Your response should be formatted as a `json` array.

For instance, given excerpts from articles studying breast cancer, and the question "what are some common genes associated with breast cancer?", an answer might be formatted like: ["BRCA1", "BRCA2", "TP53", ...]. Only include answers that are mentioned in the provided exerpts. The array should always have at least one answer; do not respond with an empty array []. Do not include any text in your response other than the answer array.

Context: Most patients had systemic manifestations, but only 25% of diagnosed patients exhibited the classic triad of hydrocephalus, cerebral calcification and chorioretinitis.
The pathogenic potential of T. gondii was recognized in the 1920s and 1930s, in congenitally infected children presenting with the classic triad of symptoms, namely hydrocephalus, retinochoroiditis and encephalitis.
Intracranial calcifications within the classical triad were only found in two cases.
Congenital toxoplasmosis is characterized by the classical triads: hydrocephaly, chorioretinitis and intracerebral calcifications.
Most patients had systemic manifestations, but only 25% of diagnosed patients exhibited the classic triad of hydrocephalus, cerebral calcification and chorioretinitis.

Question:
List symptoms of congenital toxoplasmosis triad.
["hydrocephalus", "cerebral calcification", "chorioretinitis"]